I started with a Foof sleeve but it was slipping sideways out of it so ended up sending it back (they were really good to deal with, I must say).
I'm now using a Kailo Chic tote...
... which I LOVE. It's got s dedicated padded pocket for my MBP but also plenty of room for chargers, mice, pens, books etc etc etc and it's really stylish which was kinda important to me too
Best of all it just looks like a tote or oversize handbag and doesn't scream I HAVE A REALLY REALLY REALLY EXPENSIVE LAPTOP IN ME which is great on dodgy train lines late at night
It's well constructed and really comfortable to carry too which is a bonus because I find my 15" is fairly heavy.
I haven't got protection for home but at the moment I'm just comfortable with keeping it in a place where it won't get scratched. I might get another sleeve for flexibility but not unless I see something I really like.