Firstly, these arrived quickly and in excellent shape with excellent packing and were not overly heavy or awkward.Secondly, I'm a sucker for glass and multipurpose things.I looked at dozens of terrarium/vivarium/reptile habitat enclosures. I have been trying to upgrade my leopard geckos to an enclosure that would offer enrichment and interest for both them and my family. I looked at so many pvc, wood, mdf, plastic, diy, glass etc options. I just couldnt purchase anything that cant hold a spill or will warp, that bugs could chew, would be melted or scratched very easily or is purely plastic and flexible...I don't like the exo terra due to the wide plastic horizontal bar etc in the worst spot.But this terrarium that is stackable and can hold water if I choose and has really nice components...including wire organizer/keeper options and a tight fitting lid...its so nice.I love it. I bought the rock background 36x18" for the exoterra terrarium of the same size from universal rocks and I'm floored. Looks like a show piece. The gecko is essentially a decoration to the ecosystem on display now.I am so pleased with these. I will be buying another that is 36x12x18 to stack atop my other two. I think there is no better commercial option and honestly...not really a better custom option for the price.My one critique is that they do not have a kit for hiding the space between stacked units. So I will need to make something.I'm very pleased with the quality and ease of construction and sturdiness of these terrariums.In the future, I could easily change the enclosure and make a higher humidity ecosystem with a water feature or even fish.You cant beat these.What a fantastic enclosure.I used local cholla wood, Josh's frogs dirt for one and then the bio dude substrate for the other. Leopard geckos do love to climb, they do, they made their own changes to their enclosures too.These are easy to move with help and reconfigure when you decide to do your flooring. They even have wheels as an option. We have three stacked and universal rocks backgrounds in all three. Zero problems except evaporation is fast with the no light subcutaneous heat bulbs. So have a big container of water by your enclosures even for lizards to water plants and keep your enclosure habitable for isopods and other organisms.After doing floors in the house and a remodel, I finally got my set up back in order, I added a third enclosure and renovated my first "scape". After I complete my cord mess and get my timers to obey, I have some woodgrain panels I have cut to fit for the sides and I will add those. For the front areas in-between, I will be using a perforated black panel. I put my enclosures on a dunnage (I think that's what it's called) stand meant to keep large sacks of flour and ingredients off the ground in a food facility. It's made from welded aluminum and just fits and 20 gallon terrarium under for my quarantine tank.Ensure your base is level and all your enclosures will have perfectly aligned glass doors.We will probably get another reptizoo because I have another universal rocks background. But I'm not getting it until my husband and catches a collared lizard. So, motivation....The whole family loves these enclosures. I can stare at them for hours. I may get a zen garden rake or mini yard equipment for it. I only have live plants in one now, I made sure to have a completely contained, yet wicking soil pot for them this time.You can't go wrong with these very sturdy and amazing repti zoo components and enclosures.