1. A month or so, but i watched the filler (skip it), you can find a filler list online

2. I hope you enjoy it and come back to this fandom, but there are lots of spoilers here so i'd be careful

3. I think it is great but try to form your own opinion, it's very popular and has it's fair share of both haters and fanboys. Being unbiased i'd say it's like an 8.5/10.

I don't know about others but I'd give it a solid 10/10