This is an excellent product. I am very satisfied with it and would highly recommend it.
The amount of sounds are incredible. It is one of the best values for soft synths or sounds that I have purchased. The quality ranges from superb to okay. Nothing is bad. I wish it contained some guitar strums, but overall, this product has made me a dedicated Sonic Reality customer. Also, they are really cool people to do business with (I bought it directly from them: http://www.esoundz.com).
If you can only afford one soft synth (although technically it's a combination of Sonic Synth sounds and SampleTank's sample player), I would make it this one.