There's nothing at all wrong with Asian amps for what they are. In my experience, you definitely get what you pay for though and I haven't run across one yet that can hang with the best of the US, UK, German or for that matter Canadian built amps. Just not gonna happen with price-point amps, and that's all that are made there. I own a Vietnamese DSL-1 and one of those Soldano mini heads made in China, so I am not an absolutist, but I would never gig with an Asian amp - I have my Mesas for when things get serious.
Personally, for me, when it comes to Asian guitars though, you couldn't give me one for free.