Nails & Spa had caught my eye when I went passed a month or so ago. Found it on Treatwell and booked a manicure. Absolutely love my nails!! Place was very clean, treatment was relaxing with a few nice touches that I'd not received elsewhere in London (eg sugar scrub) and staff payed attention to detail. I regretted not booking a pedicure as well and will def be going back!
They did a poor job and implied that this was because the treatment was booked through this website. Although I understand Treatwell takes a percentage, if you are going to do a poor job it might be easier not to use Treatwell at all.