Rhino is a synth that can do just about anything. Wavesequencing, waveshaping, VA, additive, FM/AM/RM, and now in 2.0 simple rompler features.
Put simply, it sounds great. And contrary to earlier versions, the CPU usage is very reasonable compared to other similar synths.
The knock on Rhino has always been: its hard to program. And it is. The interface is functional, but it takes a long-time to create sounds with it - especially as a beginner. Alot of the difficulty has to do with Rhino's reliance on flexible multistage envelopes: you can do anything with these envelopes, but if you just want to program a simple patch, they are overkill. If you just want a simple lfo instead of an envelope you can use an unused oscillator for it - but it takes just as much cpu as if the osc was not an lfo! I'd like to see a more modular approach, maybe the ability to swap out certain envelopes for simple LFOs or ADSR envs, like Kontakt.
Fortunately there is a great manual to help you understand Rhino, and a huge amount of free and commercial presets around made by people that LOVE multistage envs.
Rhino is a steal at the price, even if you only use it as a type of synth rompler - using pre-made presets. But if you can learn to deal with all the features it presents, I honestly can't think of a synth that offers greater possibilities, at any price.
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Some of their old awesome VSTs are already re-released in 64-bit and some new plugins were created during the last months. It is probable that all their other best BigTick plugins will be re-released too, Rhino included. Now... when... Nobody can't tell but I think that they are probably already working on them.