I have a 45 unit (iris) hatchling rack. I bought it in August of 2004 and overall I am very pleased with it.
Plus side: SUPER easy to assemble, heat already wired into it, and very sturdy.
Minus side: Bottom row of three shoe boxes bind very badly and as a result the water is ALWAYS spilling in those three tubs & also it is very heavy.
I plan to buy some more baby racks and will either buy their's or Visions. I have two of the new Vision racks - one of the CB-70 racks and one of the 15 quart racks that hold 20 tubs. These racks are AWESOME! they are easy to assemble, come with casters, and are open on the sides and back. They are selling a couple of baby racks now as well.
One other thing - if you do buy the rack from Animal Plastics I would advise that you buy the Iris rack - the tubs are very clear and very high quality. Worth the extra 50 cents or so a piece compared to sterilite boxes
Just my two cents...
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Peter Jolles
East Coast Colubrids
www.eastcoastcolubrids.com