This is the Cadillac of SBB's I think (In my extremely limited experience)
For a newbie without a table saw, with pest problems in the hive, during a drought/heat wave, this is it! $42.50 is a lot of money for one piece of eqpt, but the craftsmanship, the way the wood is treated (boiled in oil and beeswax) the assembly and the design makes it versatile. Comes with the sticky board (Dadant wasn't sure so I got an extra for a friend). The sticky board smeared with olive oil trapped shb as well as giving me a mite count. Putting it on, (disassembling hive in process) let me know I had 16 moth larva on the old bottom board, all in all it's been a win-win experience.
I bought it figuring I'd learn to build another one for my next hive. And to be honest, I don't think I can build it this well, cheaper. The hardware isn't cheap, the finish will endure and stand up to weather, and is bee safe. Convert to winter use is easy too. I have a friend with a table saw, but I think it will be easier to just buy another one when I assemble the materials for my next hive.
And the how to treat information and instructions are excellent, full color, with photos. Not long, one dual sided folded 8.5 x 11 sheet, but enough that I don't spend hours searching the net for answers. All in all, I'd do it again.