THIS IS MY THOUGHTS ABOUT THIS SERVICE AND SERVICE PROVIDER
I have been using different tools and software like fritz trainer and rca courses and also various books, so I think I can give my thoughts on this topic
I have no doubt about the quality of service they provide but my concern is its price, I think it is quite overpriced, 60$ for one opening completely ready to play in the tournaments, 7-8 openings for one side for white or for black costs $250 and a full preparation 15-16 openings for both sides which covers everything a player should know to play any opening very strongly costs $400. The book for the single opening will cost 10-30$ or even less for an e-book and even the chessbase fritz trainer costs 36$ which is very much more interactive and with video explanation and database.
Secondly what I doubt is after sale service.
Moreover paying 400$ for learning opening is not the best to improve at chess with that money you can get a coach (many coach teaches for as low as 8-10$ hour). This will help a player a lot.
Most of the stronger player and experienced coaches will agree with me that that till a level of 1500-1700 fide there is no need to learn opening theory deeply, just playing openings that lead to playable middle game is ok, and instead of learning opening endgame or middle game should be the phase which a person should go ahead with.
This is what I think about the service after talking with the service provider
@greatchesscoach