I've now owned the Spin Clean, Squeaky Clean, and HumminGuru.
Spin Clean: Very manual, both the cleaning and the waiting for records to dry (or drying with a cloth, which is an equal pain). Only good for those on a budget and just need to give things a very basic wash. Probably just a good maintenance cleaner.
Squeaky Clean: The parts are very DIY. The guy 3D prints mostly everything and uses a platter that looks like something that was pulled from a swivel bar chair. With that said, it does work. This is also very manual, and really only works well if you have a designated "cleaning" table, because you're going to be doing a lot of sitting and waiting. You're going to want to do one round with cleaner fluid, then another with distilled water. The most painstaking part was spreading the fluid all around with a brush and letting it sit for about 30 seconds, then manually spinning it while the wet vac goes. Which means, you'll need a separate wet vac, which could run you anywhere from 50-150, depending on how powerful you need it to be. In short, because of the wet vac, it's very loud.
HumminGuru: Stick it in, set it, forget it. The only annoyance here is that you have to pour the water into the basin, which can splash a bit. That's it, it does everything else. I also don't need to lug out a wet vac everytime I need to clean a record. If I had a time machine I'd go back to join this kickstarter, which would have saved me hundreds from buying/using the Spin Clean/Squeaky Clean.