Well, it depends what you expect - its going to be short-run, with PE parts, possibly some resins, with some future options for aftermarket (wheels and decals do already exist for the Granny Revell as is the resin R-1340 engine...).
I have few AMP copters in 1/48 and they are fine - but compare them to H-34 from Gallery/Trumpeter and e.g. A-1H Tamiya - and this is far away and expecting this can result in dissapointment.
But still - so far AMP got everything quite decent and buildable with few solvable odds here and there... (eg the clear parts needs polishing and attention with 3 step Tamiya polishing paste...flash here, putty there...)
You can get better understanding by seeing their previous work here:
https://www.kitreviewsonline.de/sikorsky-ho3s-1-s-51-in-148-von-amp-48001/
http://www.ipmsdeutschland.de/FirstLook/AMP/48001_Sikorsky_HO3S-1/Sikorsky_HO3S-1.html
And on this forum as well as there are nice builds listed:
My HUP kit looks better btw. - so depends... short-run...