I guess mostly you'd get biased results here because by and large we're all happy customers. At $250 it's great value for money, I think the normal list price is $499 which is still pretty good for what you get.
In terms of pure sound authenticity to the treal instruments, some of their synths are better than others. For example their DX7 is bang on the mark, their Moog and ARP synths are pretty good, but their CS80 is nowhere near close (Memory Moon ME80 is the class leader for an authentic-sounding CS80 clone, but its interface lacks the polish of Arturia's). The acoustic and electronic pianos are okay, but none of them are really good enough to use as leads, Pianoteq V6 blasts them out the water (but it costs way more than V Collection)
When they roll forward to the next version, be prepared to have your wallet raped because they usually want $199 to buy the update, commonly just for two or three new instruments, which doesn't make economic sense. I've learned to skip a version.