F.'em

Bad:
It eats CPU for dinner. Danger.

Big downside: No DX7 imports. No way to load own Waveforms or WT into FM oscillator. Can't do keytracking over 100% (Even Polysix can do).

Like in rest of Tracktion software filters and effects are not good sounding, they about same low quality free Vital have. Serum is at next level. Replace effects with inserts.

No way to get support. Too small user base to get reply in forums and Tracktion support will ignore your ticket.

No developer made site for sharing presets with preview.

Good.

GUI is nice except mod matrix / modifiers / macro part.

Good useable internal compressor.

FM sound is good.

Lot of configuration options.

Multi part modern envelopes with repeat.

2 Sample oscillators.

one noise oscillator.

Modulation matrix is flexible.

4 layers, each with 8 FM and 16 unison detune. Complex soundscape will kill CPU.

FM oscillator can do SAW as well. Due to weak filters do not expect much subtractive synth fun.

input filter per layer.

verdict: if author fixes serious problems and get better filters/effects then yes I will recommend it. It might be top FM synth around. It's simply not there yet and it's single developer synth. Looking at other Tracktion synths I don't think it will ever get there, once released they just minor bug fixes. If you like FM and synth in its current state then buy it, but do not buy it with mindset that it will become better with updates over time.