Pros
Gartner is a great company with a bright future & good reputation. Training is intense & will teach you more than you would have possibly expected. Take the time to invest in yourself here and you will reap large benefits after a few months. C-Level conversations will jumpstart your business acumen & provide very useful experience in short amounts of time. Reading Gartner research will shape your view of technology & how it affects various businesses, which is also quite valuable.
Cons
When it boils down to it... the SMB channel at Gartner is an output-driven, entry-level inside sales job. Cold calling is common, territories are shrinking among channel growth, and you have to maintain a quota among this happening. Micromanagement is very common as a result of such. The main "con" in this role is that success is HIGHLY dependent upon 'uncontrollables' - the territory you are given, the manager you are assigned to, the vertical (or non-vertical, which is worse) you are given, the prospecting area you are given, etc. It's important to understand the above because the culture recognizes sales that happen from these 'uncontrollables' as incredible personal feats for manufactured motivation.