i'm thinking about buying the combo

I play trash-ish metal ( think master of puppets style)

Any reliabilty issues i shoudl know?
Vintage V-100, EMG 81&60
Chapman ML-1

Jet City JCA20H
not that im aware of, people here have been using them since they were release, there havent been any problem with HT-5 threads since ive been around.

as far as i know theyre awesome little amps.

Epiphone Hummingbird
Epiphone Futura Custom Prophecy (Twin EMG)
Vox Valvetronix VT20+
Vox Wah
Boss MD-2
Danelectro Cool Cat Drive
Boss EQ

I've had it for about 2-3 months and I've had no reliability issues. It seems really strong and solid. You won't have any problems.
So far one guy has had an issue that I'm aware of. He had a swooshing noise on the gain channel I believe. theDogger is his screen name. No issues with mine so far, nice amp for the price.