Clearly a 10 in my book. I still remember playing the formula manager from EA sports. I loved that game. GPRO is kind of close but much much better.
If you like a game which takes time to learn and one that you become better every race then this is the one.
The good thing is that its only 2 races per week so even if you get hooked (as most of us playing) you wont waste too much time. Maybe a bit more the first seasons where you will have to find out some staff.
Truth is that forums will not answer all your questions due to a “Find out on your own” mentality. However, joining a team will help. Asking other people in pm will also help.
You should try it… if you like racing, competition, planning and maths this is the game for you