In case you are wondering if it is for you I would encourage you to have a go. I started with the GPS recently: I love it
It allows me to see what works well, has encouraged me to improve because I want to beat my previous personal bests and has introduced me to a wider (and very encouraging/ friendly/ inclusive) group of sailors from many different backgrounds and age groups.
I have been sailing (not always very successfully but always with a grin on my face) for many years: this has really re-invigorated me.
So have a go. You do not have to get all new kit (I and many of the others I have met have not), you do not have to think about competing against others if you do not want to (I do it to improve my sailing) and it is great fun. What is more the suggestion is a free trial. How far wrong can you go with that?
No matter whether you are a seasoned windsurfer or relatively new to the sport this is great

p.s. maybe I look at my ranking in the individual tables a bit!