Pros
They are now part of a huge network under Main Sail now so potentially there is an opportunity for networking. The pros used to be too many to list (great environment, reimbursed office equipment, money to take courses, etc). That all changed when they got bought.
Cons
All they care about are sales/GTM. They gutted all the other teams, throwing out people that had been there for years without even a day's notice. They also did a really sleezy buy-back of stocks. Founders promised nothing would change, but everything did. Typical "family" company too, meaning they expected you to work 5 jobs, but will only pay you for 3/4 of 1 position. And since you work (illegally) overtime with no OT pay, it's not like you can just get a second job. Unless you don't like/want sleep.