Had a lovely experience at the House of Elemis for my OPI gel manicure. The technician was lovely and did a great job. The general ambience is also very relaxing. However, £50 for a simple gel polish may be stretching it. This includes cuticle trimming (without soaking) and simple filing and buffing before the polish is applied. Not sure if it justifies the amount for a 40 min treatment but if that's not a consideration then you will enjoy the experience.