The biggest con of working at Gartner is they will likely move you require you to relocate down to Fort Myers, FL. While many people unfamiliar with the area see "Florida" and think "this sounds great". What they dont realize is that Fort Myers is a retirement community 2 hours away from any major city. While the beach is appealing at first, the extreme heat (reaching up to 105 degrees) often makes it difficult to go outside altogether. When interviewing they emphasize that you can leave within 2 years to go to the field, this is a bold face lie. I am approaching my 2 year mark in the Summer and was laughed at when asking about opportunities to leave.
The company highlights their company culture as one of their major selling points, while people are consistently point on "plan" (the process to be fired) when they are having a down quarter. Day in and day out account managers are pressured to sell and add opportunities without letting you organically develop these opportunities. This leads to friction with clients as they see your biweekly meeting as another opportunity to be pitched to.
Gartner is a numbers driven, sales oriented company. If you're numbers do not meet the standard and they believe you are not pushing hard enough, you will be forced out. I have seen so many people relocate across the country just to be let go before their lease is up.
The benefits preached in the interview process do not align with the reality of the situation. I was promised that after being quota live for 6 months I would be able to work from home once a week, this was very appealing as I just adopted a puppy. Once my time came, I brought it to my managers attention that I wanted to take advantage of this program and his response was "I must have missed your Winners Circle email". In addition, Gartner brags about how much PTO you are given, but this is also frowned upon. If it is the last week of the month, last month of the quarter , or Q4 in general -- do not expect to be taking any time off.