Review on Gifts2U Lucid Marbulous Marble Building Set by Chris Maurer

I wanted to love her, I really did. The product itself is well put together (pieces are solid) but I bought them to use with the Marbulous set we already have. When asked, the seller replied that they were compatible with Marbulous sets. Not sure if I have an odd set but ours are not compatible. They don't snap together, they just sit on top of each other which means they technically fit, but they aren't durable when used with our Marbulous set. Also, in the set we received, the parts were not unified. Using only the parts from this set, some parts were easy to assemble while others were extremely difficult to assemble and disassemble for an adult. Our kids were incredibly excited. Unfortunately our sets are mixed up and now it's not worth wasting time separating and packing for return. They work for the most part, but I'm wondering if there's something wrong with the set we received.