I used to work for Miami Air in a former life. As far as charter airlines go they are probably the most reputable company of this genre to fly for.
Mx is very good since a flight mechanic accompanies the aircraft during certain operations.
The lay over hotels well above averag. You will gain weight from the over abundance of crew meals.
Per diem could be better, especially on international lay overs.
New hires will be in the right seat for a pretty long period since captains stay with the company unless a better opportunity awaits elsewhere... and with the market as it is in the US that's not going to change.
Pay is also a bit on the thin side as well.
But overall, I would recommend the company to a budding airman, rather than a 10,000 pilot, that is if money is primary.