I've never owned VR3, but have read/heard about them from the various scuba 'chatter' sources, and here's my 'take' on it:
very difficult to understand and program (not intuitive to use)
difficult to repair, they have to be returned back to England for repairs
somewhat unreliable
rather bulky to wear
the 'tech' crowd (which is the market for the VR3) seems to have migrated to either the Shearwater or Liquidvision brands of computer, which are the newer/more 'sexy'/more user friendly designs.
Additinally, there are other new arrivals to the dive computer market (UEMIS, and the brand new Atomic Aquatics "COBALT') that aren't quite 'tech' computers, but are pretty close to 'tech' computers, which are also very modern looking/sexy/easy to use, which are going to take over the high-end 'recreational' computer market.
Bottom line: recently there have arrived a lot of excellent, new found competition in the dive computer market, providing lots of better designed alternatives to the VR3.