I shopped these in ground systems pretty hard. In my mind, if you want something that is truly built to last there were really only 2 vendors that met the quality mark in terms of construction material, glass thickness, anchor system, previous ratings…etc. I went with the 60” and am very pleased thus far. I installed it myself and it was more or less what I expected. I think a 20” x 20” x 48” hole is way over kill. I spoke to one of their listed installers who has been putting these systems in for years and they always dig a 15” x 15” x 36”! That’s about a 10 bag swing in the number of bags of concrete between the two hole sizes and a crap ton more back ache! Everything else is as advertised. The system weighs a ton, so be prepared to have the room and the man power just to get the boxes where u need them. Also, they can only be delivered from a semi truck so if u live on a cul de sac like we do they couldn’t accommodate. I had my system delivered to a buddy’s business and then he used their fork lift to put it into a flat bed trailer I borrowed. It’s in we love it, the neighbor kids all love it, excited to finally have some fun now. Cheers!