I waited a full year to write the review so I could give a user's opinion; it's been in the studio and used on stage and I can't fault this little synth, it's a gem.
Touted as a semi-modular it can be used without patch leads as a standard 2 VCO monosynth with LFO modulation and a silky filter based on Moog's 904a ladder filter. From deep bass to searing leads the GM has a character all its own, it doesn't pretend to be a minimoog nor is it a Rogue.
Combined with some unique features, I love the arp and sequencing functions, this is a very capable synth at a bargain price. Real quality keybed (take note Korg) make it a joy to play live too.
Patching capability really brings this life, from very simple like patching the LFO to the mixer to so its a 3rd VCO/Sub Osc to more complex - I utilise two way patching between GM and eurorack to get the best out of it - shows what this lil Moog is made of.
Overall - it's the best value Moog out there, and I might just get another and patch them together.
Good bits - everything, its a real Moog
Bad bits - like most new gear, I wish the power was inside and took an IEC cable