I have 3 G4m saxes. Tenor alto and sop. Elsewhere on this forum I have discussed them.
They are great saxophones and red submarine have a no quibble returns policy in the unlikely event that something should be wrong.
I would recommend buying their normal instruments. The shop soiled, ex demo and special offers have faults. These are simple faults that an experienced player/tech can easily fix but may baffle and frustrate a beginner.
I think I've had my alto for almost two years. It played great straight out of the box and the only thing worth mentioning is the nickel plating has worn off the right hand thumb rest through playing it so much.
The tenor was "ex demo". It needed a pad refitting and regulating before it would play. I had no problem doing this myself and enjoyed a bargain £190 price tag. It plays great and has had no further issues in around a year.
The curved soprano was also "ex demo" and wouldn't play. It needed some reshaping of the keys and levers with a hand grinder as they were clashing. It came in at £160 and plays great now.
The alto and tenor are laid out like a Yanni so the hand friendliness is the same.
The sound will be you, so a clip of my alto is meaningless.