Pros
They do like to promote from within, usually, however it is not the rule. If you're into free snacks and what not, then you'll be quite happy. If you're fresh out of university, this is an excellent job for you with a much higher than usual first job base salary. The sales training is good and will set you on a path to a strong sales career in the future. If you are an experienced rep, stay away, this is not for you.
Cons
First things first - if you're an inside sales rep the odds of making six figures are slim to none. Even the highest achieving reps make nowhere near that. Based on the average base salary of the team ($35k - $45k, depending on your negotiation skills), you would need to achieve almost $2MM in sales per year to reach $100k total compensation. Commission varies, with 5% paid out on the first month of a contract, then dropping to 2% in each subsequent month. If you're able to double a client's spend, it leaps back up to 5% for another month, then back down to 2% and so on. Also, after a client has been on the site for more than one year, you lose all commission going forward, yet remain responsible for their spend against your budget. With most clients billing at 2% commission and the average sale being $3k to $5k per three month contract, you're hard pressed to make that $100k You are responsible for sixty dials a day, that's 6-0 phone calls, every day - no excuses or 150 minutes on the phone. There are no territories and if you fail to close a client within 60 days, any other AE can (and will) steal the account. Example: if you have a client that is willing to come on at X amount, 90 days from now, a competing AE can request the account and close the sale as you failed to do it within 60 days, in spite of having notes suggesting a start date later in the year. The title of "account executive" is also misleading. The inside sales role is, essentially, a call center job. While there are opportunities to advance, there are hard and fast rules on how you can advance.