I really liked this system! It was EXACTLY what I needed for my roleplay! (I reccomend giving the players some example sigills and having to figure out the runes and their rules by themselves, the players loved it! You can really learn the system and customize the spells. I think it is a little bit complicated because physics plays a role in it and it is in my opinion a little to specefic sometimes but it was very easy to just homebrew away for your needs! I really like it and recomend it!