He is one of the true professional coaches, highly recommended. Steve Barton is another very active coach, look up Barton Snooker on YouTube. Both are great, Barton is quite a bit cheaper than the first, but both are dedicated, knowledgeable.
Nic is worth it. You will learn a lot about your game. He will have you record yourself playing shots from several different angles and then give you a breakdown of everything you are doing wrong. He will then prescribe a training plan based on the amount of time you have to practice. If you do the monthly lessons you get a one hour call each month where you can talk through how it’s going and he will give you advice. You don’t need to have a table handy during the call, but you can if you want.