Pros
Commvault has grown solidly over the past decade. They have a very good product and in general, will go out of their way to make sure that their customers have a good experience with their solutions. They have a good (not great) eco-system of partners, which depending on the area of country are helpful to the overall sales process. Financially, Commvault has very strong balance sheet for company of their size, but they are fiscally very conservative. This has bode them well in the current economic climate and will continue to do so in the near term.
Cons
Commvault's boarders on the fringe of being brutal. They have had HIGH turnover in the sales ranks for the last 4 years. "High" is defined by greater than 30%. Moreover, they have turnover more than 50% of their first line managers in the last 6 quarters. They recently split the sales force into 2 functional groups: "Enterprise and Core". While it a good strategy overall (for companies that have critical mass), this has been somewhat disruptive for the sales organization as they enter FY'11. The managers at Commvault beat up their sales people with process and documenting the sales cycle, to the point where it is almost punitive. A great deal of recruiters have stopped working Commvault because of their recruiting process, which further lends to the perception of the culture. Sales people can make money there, but be advised that is all about the territory that you take over. Commvault's market share is less than 10% of the data management space, so the competition is formable and Commvault is clearly out-manned in the Fortune 500 by larger competitors Symantec and EMC, although they have been steadily chipping away at Symantec's market share for some time now.