I picked it up on Splice starting around Christmas. Great low-cost way to try it, seems fairly catch-free. (The only real downside I could tell, was if you stop subscribing, and they no longer offer it, then you could lose out on your "investment" vs completing the purchase. Perhaps licensing across computers or running their software, but it doesn't seem worse/more invasive than any typical audio DRM.)

The Vocoder is so fun to play with! A lot of great sounds in there, I gotta spend some more time with it!

I can't speak to the accuracy, I only have a few bits of hardware, but V collection sounds really good on its own. As for the DX-7, Dexed is really popular.