The first one delivered with a corner damaged (looked like a factory corner welding issue), but Revain replaced it quickly. The new pan was straight and square and dimensioned as advertised. If it comes with preassembled fittings, make sure they are tight. This 24x24 in pan dropped right into a slightly oversize opening (1/4" on all sides) with no problems. All edges were flush with the surface without any weight from the glass (purchased separately). I plumbed mine for propane. make sure you buy the hoses, LP air mixer and fittings rated for the BTU's your pan can handle. My first set of hoses and fittings were too small for this unit. 24x24 unit goes through propane fairly fast. I emptied a 1/4 full 20lb tank in about 2 hours. Overall I would buy it again if I ever made another custom pit.