Pros
I recently finished my time employed as a remote team member at Percona to pursue more experience outside a services company. Had I already gained those stripes I would still be a happy Perconian. It's a fantastic company to be part of because it truly values it's people whilst providing both technical and non-technical challenges. Percona has a very strong reputation in the MySQL community and as such that reflects on those that hold a place there. Working at Percona I was given opportunity and coaching to advance in both technical and non-technical paths which proved to me that the people around you are invested in mutual success not just furthering themselves. The executives are focussed not only in today but also in the future of the company through responsible investment in talent and an evolving product line. The size of the company permits Percona to pivot when the market calls for it. Peter Zaitsev, CEO, and Vadim Tkachenko, CTO, instil a culture of learning and sharing which is a joy to be part of. They encourage and coach through their natural demeanour bringing an extra dimension to membership of the company.
Cons
I don't have any 'cons' to mention. It's a small company with deep history. There are folks within the company that are happy to be agile and embrace changes, there are some folks that like the romance of a 10-person-startup a little more than necessary. Percona is growing so the normal growth pain points apply.