I for one love this format. I'm not sure why it would be marked 18+ for 500+ pieces and probably a relatively simple build, but aside from that marketing choice, I like the look of it, and the rumored price is a good surprise.
The exposed studs don't bother me at all. Don't get me wrong I love tiles, but this is an official set and the mix between tiles and studs, especially for Boba, looks really good to me.
Full disclosure, I never bought anything else than ships and vehicles until Yoda was released (a set which I also consider to be a very well designed) and I would seriously consider collecting those helmets.