Ordered one of these conversion kits about 3 years ago for my crestie's setup, and I am currently in the process of building another setup for most likely a second crestie. I loved the product back then, but on opening the package today, I got a surprise; it's even better now! My only gripe ever with the product has been that my older setup doesn't work well with digital temp/humidity meters that have probes and sit outside the tank themselves. This has been easily manageable by using other style meters, but I do prefer the probes. I noticed a sort of gasket (not entirely sure if that's the right term) on the one I just got, up in the corner, and whether or not that's it's intended purpose, I know I can easily use or modify it to run the probe wires through without having to cut the door material or tank! I just might have order another one now to replace the older setup's door (not that it needs it, as it's still in perfect condition 3 years later; I just love the minor, but amazing, design improvements). Can't praise the product and company enough, and you have made this nerdy gecko-lover's day!