Well . . . I would say yes, some of them are excellent, I found I actually preferred them to TH-U's rigs, having said that, I never really actually used them ?, or Revalver itself for that matter, I did mess around with them from time to time, but always ended up elsewhere, and I have sold my TH2/TH3/TH-U + 8 Rig packs.
Bare in mind you will need the ACT Combo first to use any of the Amp Clones, it's only $19.99 now, I seem to recall it was more like $39.99 or $49.99 way back when I purchased it. The amp clones themselves are cheap, they show now at $2.99 with $5.99, they were always $2.99 when I purchased them from the Peavey Amp Store way back.
Make of that what you will ?