I love Splash for shallac manicures. It's so easy to get an appointment and the manicures are always very well done. I accidentally cut the shellac on one finger and they were able to see me immediately the next day and re-did it free of charge.
I've been going to the Goodge St salon for beauty treatments for 3 years and the manicures (even express-OPI) always last really well. Such good value for money.
I had a Hollywood wax and the service was, as always, lovely. Very thorough and professional. Unfortunately, even though the wax didn't feel too hot and the beautician was as gentle as you can be with intimate waxing, I did notice a small burn/ flaking skin the next day, which I have never had before!