So I discovered these at Wal-Mart and figured I at least check them out given they all were all under ratio as long as they were not one of the double minifig packs. They are all $2.98
So I was surprised buy the quality of the plastic. It was nice and sturdy but certainly had a different feel to it then LEGO or even MEGA BLOKs. Though I couldn't fit the core of the minifig into the body so I didn't assemble it.
Before I put the set together I tried the pieces with LEGO plates and compared them. So they are technically compatible but there are some issues. The plate elements are just a bit thicker and the studs share the same trait leaving a gap everywhere. Also they are a tad loose as if the stud is a hair too thing. This is also reflected in the build as well.
Opening a second bag I see these traits are pretty consistent and after looking at the bags the designers are not the best I would so. So I would NOT recommend picking this up and I think the destiny of these are a Goodwill donation.