Actually even the product sheet that came with it recommends layering coats of the product. Do a search on here (old forums I think) and you'll find posts about layering Klasse). I also allow a minimum of 10 hours drying time in between applying and buffing off. Last night I put on a coat at 6 and buffed it off at 10 this morning. Thats 16 hours of drying time and remember that this was only one coat and it didn't come off any easier by hand (tested one panel by hand). It was so much easier with the buffer.
As for a lack of power, no amount of pressure I put on it stopped it. It kept running.
As for using "normal" OTC products, I don't use them (not wax anyways) so that point doesn't apply.
For a product that comes off easily (1 wipe or so like my Pinnacle Signature Series carnauba), then removing by hand is quicker. But for a product like Klasse where you could wipe it 10 times and still have product on the car and you need something a bit more, then this buffer is perfect.
Can I ask why everyone seems to have a stick up their rear when it comes to detailing? Specifically buffers? I got the same kind of responses in a previous thread. Certainly everyone doesn't use the PC (or similar high quality buffers). And I know thats a fact because in response to my last thread, a CEGer PM'd me and said that he had great results with one of the cheaper buffers like the one I got. But he didn't to post it in the thread because of the whole "do it with a PC or do it by hand" mentality. Realize that everyone has different applications and needs for such a tool. If someone really needed to do some serious defect removal, then yes, I'd say go for a PC Orbital or even a rotary buffer (if they have the experience). But if someone just wants a wax removal tool (and there are situations where this is needed such as Klasse), they certainly don't need to spend $150 on a buffer.