Feature:
i don't use effects so i have no use for it

Quality:
so far no problem, if something goes wrong i don't care i have 2 yr warranty opn it full replacement it is woth the extra $20.00

Desirability:
it is very modern look the chanel lights are on when select chanel not bad at all

Sound:
it sound svery good i use to hate line 6 alway though they were bad sound due to i am a tube amp freak,i know a lot of people that alway tell me lines 6 this and line6 that i try one of the small units i was not satisfy,i sold my gear looking for new sound i have been looking for a sound for 20 yrs this is the closses to the sound i was lookign for i got 1/5 stack a little much digital but it sounds good better than any crate, the only crate i will by it will be tube crate i use to have a gt350 shckwave it was ok not that great i sold it and got line 6 spide75 h the spider 150h it is not louder than the 75 it is the same thing it has more amps modesl same as loud it is 75w per chanel so it will be 75x75 not worth the extra $100.00

Ease of Use:
a blind monky can set this thing up very easy

Support:
never dealt with them so i don't know

Overall:
i like that it is very loud and you can get any sound you wanted well almost maintenace free not worry about tube replacement ps i have a tube amp at the house,new epiphone socal i run both at the same time on stage, "CAUTION EXTREME LOUD" in case this one crap on me i have the other one i don't think that will happen any soon