I've had a very good experience with PS CS5. Runs like a charm, no hick-ups whatsoever. Quite economical, too.
Me too, when I was using CS5, and also Lightroom: no problems. However I've had a number of minor issues with the PS+LR subscription. No show-stoppers, but minor issues, one after another.
It took several days and around 5 hours of phone calls and online chat sessions to sort out my Adobe account before I could subscribe to the package. Then the CC app got confused about Lightroom. Then several updates I've had to do twice. Then there came CC 2014, and wasn't that handled badly by Adobe! Then after updating to CC 2014, it insisted that I didn't have "Photoshop CC (2014)" installed, but said I had "Photoshop CS6" installed.
I think the issue is that Adobe's online systems aren't very good. I include subscription and user management, and systems for downloading and managing sofware. With stand-alone software this doesn't matter so much, as you need to use the online systems no more than every year or two. With subscription systems, you depend on regular use of the online systems, and the questionable quality becomes much more obvious.