This crate is great.  I ordered Large size and it is plenty spacious for my 50lb hound.  He is quite tall and has plenty of space to move around.  It is easy to put together (no tools are required).  The top and bottom piece are fibreboard/pressed wood and the corner slats are plastic.  The wire crate is a little flimsy.  The frame adds support to the structure which is good.  Dogs who want to escape might be able to bend the wire of the crate; it is fine for my guy though.  I only wish crates would give an option to open the doors from either side.  This limits how the crate can fit into the space where I want to put it and that is the only downfall for me.  Good value for the cost.