READ ONLY ( Traded eBooks )
Language : 9/10, No errors as far as I could see, not a native speaker however
Compatibility : 8/10, I don't see where this couldn't work.
Ease of use : 8/10, It's really simple. Could take some time though. You can do this in your spare time or something.
Method itself : 6.5/10, It's not common, but also not rare.
Final review : 7/10, Easy, could take some time but will get you some profit. It is worth it.