How is Accel-KKR viewed in the tech growth/buyout space?

Currently a 2nd year analyst at a MM tech IB group in SF. While prepping for off-cycle process and jotting down the universe of tech focused PE firms in the Bay area, I came across Accel-KKR.

Can anyone provide insight to the quality of deals/returns they see? And maybe comp and culture? Also, how do they stack up against more well-known firms like Thoma Bravo, TA, Genstar, Insight and others?

For a firm with only ~15 years of history, their fundraising efforts look very strong.

Thank you in advance.