I usually go to the Shoreditch branch and I think I'll be going back there in future. My manicure was fine. A bit untidy - especially around the cuticles - and it's growing out quite quickly. Not chipping which is great but I'd expect a bit more care for the price.
The manicurist was a good balance between honest and helpful, giving recommendations but allowing me to make the final decision. AND they were open on a Sunday!