I bought this about two weeks ago and used it for the first time last Saturday on my bikini line.
The bad news:
It was pretty (ok, extremely) painful - that's a sensitive area with fairly dense growth, but I was determined to use the highest setting so I just stopped every few beeps to recover. I'll definitely be picking up some lidocaine for next time. I divided the area into 1" sections and tried to go over each section with overlapping as described in the manual; I definitely didn't get in the full 35 beeps per section, probably more like 10-15. Ouch. I also used it on the middle setting on my underarms, but didn't really cover it heavily. At that point I was tired of being in pain

The good news:
I didn't expect to see results for two weeks, but I've already seen a HUGE difference on my bikini line. Much better than I expected after a single treatment. Where I used the laser, I probably have an 80-90% reduction; some hairs are still coming in but it's waaaay less than the areas I didn't use it on. And the laser definitely hurts less on areas with less hair, so I'm hoping it'll be less painful when I do it again. Also, some of the hairs that are coming in are really loose - when I tug on them they slide right out.
My underarms - where I used the second highest setting and didn't overlap - seem a tiny bit lighter but not significantly. I think you really have to suck it up and use the highest setting.
I have pretty light skin and dark blonde hair (darker on my bikini line.. wow its weird to be discussing this on the internet!). I really bought the laser primarily for the bikini line, so I'm completely satisfied with the results. I don't know how long they'll last and if they'll actually be permanent, but frankly I don't really care - if it starts to grow back I'll just laser it off again. Anything's better than having to shave that area.