Pros
Pay, benefits, inclusivity, flexibility, training - the company does a lot of things right in these areas. Many people do well but you have to lean way in and make the job an outsized part of your life. Gartner generally does figure things out (in terms of its own growth strategy) and they are an indispensable part of most companies. Very well regarded and very well known company.
Cons
Demanding and somewhat toxic sales culture, lots of turnover on account management side, very metrics driven. You are paid well but are expected to perform, company trying to find its footing to get back to double digit growth and it will fall on the shoulders of sales. Success is a matter of your sales territory and manager. If you aren't doing great they will make you feel it by all the adoration showered on top performers.