Pros
Cvent has a great training program that they start you out with. They give you a goal that is obtainable in your first year to let you get your feet wet. If you slay it you can really make a name for yourself at the company. You don't necessarily have to work 90 hours a week as long as you work smart not hard. If you do well you can really accelerate into leadership positions and get a big pay raise once you prove yourself. Yes, you will work hard its a sales job but they will reward you with good commission, awards, trips, recognition etc. Fast growing company that is by far the biggest and best in the Event Management space. Benefits grow and get better every year. CEO and VP's care about their employees and make themselves available to everyone more then I have ever seen in a company.
Cons
Pay and benefits are probably still lower then the Microsoft and Salesforces of the world but if you stick with the company as they continue to grow something tells me you will be rewarded.