I have assembled several of there planes. Being a builder and not an assembler I don't have too many problems with the total crap they sell, for the price of the plane I can end up with a pretty good flyer. The air frames are weak to say the least, the hardware is throw away the instructions are so funny/bad my wife took them to work so she could teach her people how to speak Chinglish. Support, there isn't any!!
I don't fly ARFs myself but I do assemble them for other people. Are they any good?? No, not as they come out of the box. Will they last?? No, but you can get a season out of them if you don't have any hard landings or fly them too hard.
In my case if I have a friend that just has to have one I will assemble it for them and do some magic stuff so they are a bit stronger.
It's hard to walk away for the price and the planes aren't bad flying machines but they aren't the deal you would think. I would never own one myself unless it was a gift.
There size is also a bit of a strech too, there 90 size is a small light weight 60 size plane. Go figure???