I have to agree with J.Vandegrift . I had AP make a v-18 (vision hatchling tubs) rack with flexwatt belly heat and I love the results I have gotten. The tub is long enough to still have a heat gradient and a hotspot. I also use some RBI 28qt tub racks and have really liked them. I think you really can't go wrong with either company or product. I think it really depends on your goals/plans. If you anticipate needing more than 16tubs, go with AP. If 16 is all you need, RBI may be the simplest as the price includes shipping and the tubs. When I ordered my V-18 tubs, I was aggravated at how much shipping was on the tubs alone. Plus I paid shipping on the rack through AP.