I would give this place an almost perfect rating... if it weren't for one nail technician currently employed there. First the good--they are the friendliest staff as far as Park Slope "spas" go. You feel welcomed as soon as you come in. It is a little cramped by the waiting area (not much going there), but you don't end up waiting long.
I have had a few nail treatments done. Whether it was the Elemental mani/pedi, or just the generic, most of the technicians take their time and work, not just your nails, but the whole area. (Add on the extra 10 minute foot massage--it is sooo worth it.) And the best thing about their service is, not once have I ever felt rushed, or as if my appointment is an inconvenience to my technician. (The place on 9th and 7th, on the other hand, will never have my business again for that very reason.) My nails are done well, and I look forward to my return trip everytime.
That said, avoid the technician with the gold (I think? or poorly capped) tooth. I can't remember her name, but I have had her one before. I have watched her work on other people. In short, she has ADD. She looks everywhere BUT at what's she's doing. She leaves out parts of the pedi routine, and she's not very soothing, like the others. Not a fan of hers at all.
But go here. It's worth it for great service, lovely people and reasonable prices for great service. (BTW--The guy that does the massages also knows what he's doing. Soooo good.)
Pros: Great service, wonderful mani/pedi, love the massage.
Cons: The technician with one weird tooth.