TS, what firmware are you using?
Have you consider to upgrade to firmware or change to Superceleron firmware?

I am having the same box and I find it very stable, responsive and value of money.
Of course it not as good as the most earlier but after few DIY mod it is good enough for me. Major problem I was having is the heat, this box is quite hot and it is better make some holes for venting or add a fan to it.

Got it for RM288 from lazada.