Pros
Culture is absolutely fantastic. I made more than a handful of life long friends here. Network expansion was phenomenal. I now have around 50 contacts across multiple industries and verticals in tech. No other company could offer the network that MB does. I will never have to look for a job again because of this place. A lot of the Cons I've seen on here I actually view as positives. Success is based on the client you got? Well that's a good thing, you now know what you want to avoid in your next role and you've probably been put in a situation that has done nothing but better yourself as a salesperson. Don't worry about making an extra 5k at MB, worry about making an extra 100k down the road. Finally the training you get is one of the best in the entire industry. You are literally surrounded by sales people. Everyone you talk with has a wealth of information to offer. Work here for 3 months and you will be running laps around 80% of the SDRs out there.
Cons
Not much. My salary as an SDR was good. As a manager it was a bit on the light side. Like I side though, worry about how much you make a couple years from now, not when you're just starting your career.