Sorry,

>1. Doesn't support multilanguage well. Some characters become

For languages dutch, english, french, german, germani, italian, russian, spanish and for very manu users work well, but for deeptii - Not !?
And not wrote any correct remark - what exactly don't work!?

>2. Not flexible enough, such as can't control whether to show >Buy button, etc - requires code hacking.

May be if deeptii can read documentation - he will can found for that description.