Pros
Out of most big commercial tree companies, they're one of the better to work for. Unfortunately, that's not saying much. If overtime is your thing, and you live to do tree work, this might be your thing. If not, stay away.
Cons
Horrible working conditions are common and customers give very little appreciation even on the most professional job done or difficult working scenario. There's a very poor wage, and many of the people drawn to this field are rejects from any other profession. In addition, you'll find yourself competing with other tree companies, the kind most would call 'hacks.' Not only that, but people will assume you're one of them. Advancement opportunities are very limited, and unless you squeeze your way into a sales rep or corporate position, you'll end up working as a foreman for the rest of your life. Do you want to be stuck cutting down, trimming, and hauling trees until you're 65? If you even make it that far in this field without a serious injury knocking you out of this line of work, consider that winning the lottery.