Just wanted to add my experience as food for thought. Considered the Audio Desk and the KL, but was put off by the beau coup bux required and spotty user comments regarding post-sale support on the Audio Desk.
Purchased the V8 cleaner, primarily because I could control temperature, agitation and batch process my collection (400+). I've found it to be a superior value, and have tried a few different techniques. The one that seems to work the best is ambient temperature distilled water, some isopropyl alcohol and about 20 minutes at maximum agitation. Even cleaned up some of my wife's (literally) moldy oldies to a playable condition. Drawbacks are that it is a batch device so not really suitable for cleaning just one LP and less-than-serial manufacture accessory execution.
Completed cleaning every disk in the house before Thanksgiving and have been listening to a broad variety since then. Like Dave said when I bought it, it can't fix damaged records, but it sure does get the gunk out of the grooves. Even an original pressing of Teaser and the Firecat I played to death as a child became playable on my PL15 / OM 2M Red. A Spyro Gyra LP from my wife's collection came back enough to merit my Sota / Graham / DV XX2 Mk II.
Now, where to go from here? I may decide to offer collection cleaning services or off the V8 and go with a KL (still leery of the German "functional disturbances based on these specifications are impossible" approach to customer service by Audio Desk I've seen reported a few times - unforgivable in a $5K discretionary purchase). My trusty Discwasher brushes (have 2 from back in the day and they are still the best manual devices, IMO) work just fine with my preferred cleaning solution for LPs that have gone through the V8. I've also found that as long as a mold release agent remover is used, the ultrasonic treatment isn't really needed for initial cleaning of sealed, new records.
Regardless, I've concluded that ultrasonic record cleaning is the biggest advance in cleaning to come down the pike since the original vacuum devices were introduced. Strongly recommended for having fun and happy listening!
