Lightroom 5 released
OTOH the changes from LR4 to LR5 are minimal in comparison. IMO LR5 should really be LR4.5
I'd highly recommend upgrading to LR4
[i]Bodies: 1x K-5IIs, 2x K-5, Sony TX-5, Nokia 808
Lenses: Pentax DA 10-17mm ED(IF) Fish Eye, Pentax DA 14mm f/2.8, Sigma 17-70mm f/2.8, Pentax-A 28mm f/2.8, Sigma 30mm F1.4 EX DC, Pentax-A 50mm f/1.2, Pentax-A 50mm f/1.4, Pentax-FA 50mm f/1.4, Pentax-A 50mm f/1.7, Pentax DA* 50-135mm f/2.8, Sigma 135-400mm APO DG, and more ..
Flash: AF-540FGZ, Vivitar 283
FF: Pentax K-1, D-FA* 70-200, D-FA 24-70, D-FA 100, D-FA 28-105, FA 77, FA 43
APSC: K3, K5, DA*50-135, DA*300, Sigma 17-50, Sigma 10-20, 18-55mm, DA 55-300mm, DA35, 1.4TC
4/3: Q10, Q, 01, 02, 06
Fuji XT1, XF18-55, XF27
You can upgrade from any version of Lightroom to v5 for £50. Would definitely go for 5, I've been using the beta since it came out and find a use the new radial graduated filter so often it's very frustrating going back to 4.
What are you using it on? I use the adjustment brush to highlight stuff, but it's rarely of a circular or elliptical shape.

[i]Bodies: 1x K-5IIs, 2x K-5, Sony TX-5, Nokia 808
Lenses: Pentax DA 10-17mm ED(IF) Fish Eye, Pentax DA 14mm f/2.8, Sigma 17-70mm f/2.8, Pentax-A 28mm f/2.8, Sigma 30mm F1.4 EX DC, Pentax-A 50mm f/1.2, Pentax-A 50mm f/1.4, Pentax-FA 50mm f/1.4, Pentax-A 50mm f/1.7, Pentax DA* 50-135mm f/2.8, Sigma 135-400mm APO DG, and more ..
Flash: AF-540FGZ, Vivitar 283
You can upgrade from any version of Lightroom to v5 for £50. Would definitely go for 5, I've been using the beta since it came out and find a use the new radial graduated filter so often it's very frustrating going back to 4.
What are you using it on? I use the adjustment brush to highlight stuff, but it's rarely of a circular or elliptical shape.

It's really useful for bringing up exposure and/or sharpness in general areas of your images and since it's graduated you don't tend to notice the edges of the adjustment as much. For example in the image below I have two. One is positioned exactly on the iris of his eye with contrast, exposure and sharpness pushed a little and then another ellipse type shape over the general area of the eye towards his beak to raise the exposure a little to bring out the detail:

FF: Pentax K-1, D-FA* 70-200, D-FA 24-70, D-FA 100, D-FA 28-105, FA 77, FA 43
APSC: K3, K5, DA*50-135, DA*300, Sigma 17-50, Sigma 10-20, 18-55mm, DA 55-300mm, DA35, 1.4TC
4/3: Q10, Q, 01, 02, 06
Fuji XT1, XF18-55, XF27

Those are both appliactions I'd use the brish for.
Btw - I use an add on called Paddy, which allows you to call up Brush Presets with stored brush sizes and feathering. Very handy and saves loads of time.
It also allows key commands for dev presets and much other stuff too

[i]Bodies: 1x K-5IIs, 2x K-5, Sony TX-5, Nokia 808
Lenses: Pentax DA 10-17mm ED(IF) Fish Eye, Pentax DA 14mm f/2.8, Sigma 17-70mm f/2.8, Pentax-A 28mm f/2.8, Sigma 30mm F1.4 EX DC, Pentax-A 50mm f/1.2, Pentax-A 50mm f/1.4, Pentax-FA 50mm f/1.4, Pentax-A 50mm f/1.7, Pentax DA* 50-135mm f/2.8, Sigma 135-400mm APO DG, and more ..
Flash: AF-540FGZ, Vivitar 283
Corporate speak like that sets off alarm bells for me - it wouldn't be the first time a software company dressed up a downgrade to look like an upgrade...
My Flickr • Pentax K-5 • K-5 II • Sigma 8-16mm F/4.5-5.6 DC HSM • Tamron SP AF 17-50mm F/2.8 XR Di II LD ASL • SMC Pentax-DA* 50-135mm F/2.8 ED [IF] SDM • SMC Pentax-DA 55-300mm F/4-5.8 ED • SMC Pentax-DA 18-135mm F/3.5-5.6 ED AL [IF] WR • Vivitar 100mm F/3.5 Macro AF • Metz Mecablitz 58 AF-2
Barrie
Too Old To Die Young
http://www.pentaxphotogallery.com/artists/barrieforbes
https://www.flickr.com/photos/189482630@N03/
The advertising blurb for 5 mentions 'tighter integration with photoshop' - my concern with this is: do you lose any functionality (comparted to Lightroom 4) if you don't have photoshop (I don't)? Anyone here know the answer for certain?
Corporate speak like that sets off alarm bells for me - it wouldn't be the first time a software company dressed up a downgrade to look like an upgrade...
No. I've been trying out the LR5 beta and also found nothing missing.
[i]Bodies: 1x K-5IIs, 2x K-5, Sony TX-5, Nokia 808
Lenses: Pentax DA 10-17mm ED(IF) Fish Eye, Pentax DA 14mm f/2.8, Sigma 17-70mm f/2.8, Pentax-A 28mm f/2.8, Sigma 30mm F1.4 EX DC, Pentax-A 50mm f/1.2, Pentax-A 50mm f/1.4, Pentax-FA 50mm f/1.4, Pentax-A 50mm f/1.7, Pentax DA* 50-135mm f/2.8, Sigma 135-400mm APO DG, and more ..
Flash: AF-540FGZ, Vivitar 283
No. I've been trying out the LR5 beta and also found nothing missing.
Thanks!

My Flickr • Pentax K-5 • K-5 II • Sigma 8-16mm F/4.5-5.6 DC HSM • Tamron SP AF 17-50mm F/2.8 XR Di II LD ASL • SMC Pentax-DA* 50-135mm F/2.8 ED [IF] SDM • SMC Pentax-DA 55-300mm F/4-5.8 ED • SMC Pentax-DA 18-135mm F/3.5-5.6 ED AL [IF] WR • Vivitar 100mm F/3.5 Macro AF • Metz Mecablitz 58 AF-2
I'm on the trial version of LR5 and so far I can't find anything missing that was in LR4. I think the clone/ healing brush is more akin to Elements/Photoshop, if that's what they mean by integration
Thanks also!

My Flickr • Pentax K-5 • K-5 II • Sigma 8-16mm F/4.5-5.6 DC HSM • Tamron SP AF 17-50mm F/2.8 XR Di II LD ASL • SMC Pentax-DA* 50-135mm F/2.8 ED [IF] SDM • SMC Pentax-DA 55-300mm F/4-5.8 ED • SMC Pentax-DA 18-135mm F/3.5-5.6 ED AL [IF] WR • Vivitar 100mm F/3.5 Macro AF • Metz Mecablitz 58 AF-2
Smeggypants
Member
Smegland
http://www.dpreview.com/news/2013/06/10/adobe-lightroom-5
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[i]Bodies: 1x K-5IIs, 2x K-5, Sony TX-5, Nokia 808
Lenses: Pentax DA 10-17mm ED(IF) Fish Eye, Pentax DA 14mm f/2.8, Sigma 17-70mm f/2.8, Pentax-A 28mm f/2.8, Sigma 30mm F1.4 EX DC, Pentax-A 50mm f/1.2, Pentax-A 50mm f/1.4, Pentax-FA 50mm f/1.4, Pentax-A 50mm f/1.7, Pentax DA* 50-135mm f/2.8, Sigma 135-400mm APO DG, and more ..
Flash: AF-540FGZ, Vivitar 283