Did my nails (shellac) with Oksana - she is very pleasant and professional, did my manicure and coating perfectly, would recommend her, also, she is a Russian and Ukrainian speaker, for those interested.
The hairdresser was very professional though I did end up with a haircut I wasn't expecting. She was also going to charge me more, though I explained that I had booked it through Treatwell and she charged me the price I was expecting. All in all, the experience was okay. I am not sure I will go back there, but she did a decent job compared to a hairdresser chain like Supercuts.