Good quality and in some ways on par with Mortensen more than Math but unfortunately limited product available to choose from as the company went out of business years ago.
MATH U SEE
Decent quality but limited product to choose from as far as blocks are concerned. The plastic is a softer plastic which can warp. The width and height of the blocks are not uniform. The decimal and algebra inserts add weight and bulkiness and produce an unevenness in the blocks and they also tend to come out when the blocks are moved around too much. That being said the blocks are still really useful and fun to play with.