The frame oscillator makes Krishna really shine for very complex and evolving patches. It basically takes a wav file, slices it into small pieces that you can use as a very massive wavetable (thousands of waves against the traditional 32/64). Than you may set an envelope or a lfo to vary among frames. If you want you can even draw waveform by hand and morph among them.
There are two other oscillators that have basic waveforms (saw, triangle, square) and the synth structure is like a subtractive one.
Another wonderful feature is the modulation assignment that is made by dragging the modulation source on the modulation target.
Krishna has various envelopes and lfos. A very interesting feature is about lfos. You can move a parameter "by hand", Krishna remembers your movements on a buffer and , if you want, you can create an lfo that reproduces them with just one mouse click.
What I've written is not meant to be a comprehensive description of Krishna, but it is what I feel really exciting in this synth.
Now let's have some analytic decription:
UI: Great, all in a window. Clear, logical.
SOUND: Great, expecially for evolving, complex sounds
FEATURES: Frame osc, lfo and envelope a gogo, infinite modulation possibilities, good effects section and also a valve simulation
DOCUMENTATION: comes with a pdf manual that's well written, could be more complete.
PRESETS: There are thousands of them but their quality is not stunning. However, remember that with this synth you'll want only create your own patches. The frame oscillator let's you import anything from a sample, a drumloop, a noise, a speech....
CUSTOMER SUPPORT: Never had a problem, so I don't know.
VALUE FOR MONEY: Very good.
STABILITY: It never crashed on my system nor in Ableton Live, nor in Cubase, even when importing long samples.
What's more Krishna is definitely easy on the CPU