Pros
Extra Space is a stable company that was in the right place at the right time during the recession and has an economic rent in the short to medium term within the industry. That is, the company bought assets in limited supply at a favorable price and doesn't have to work that hard to do reasonably well. This makes for a fairly stable place to work where long hours are not generally the norm, but compensation generally matches this. There are certainly exceptions where compensation and payrates are more competitive.
Cons
The company talks a big game on innovation, but is afraid to really commit and take financial risk on innovative ideas that will be revenue drivers 10 or 20 years out. Even shorter term operational projects end up being a bit hamstrung by resource constraints resulting in sub-optimal results. Career advancement is limited, as a general rule, unless you make the right impression with senior leadership early in your career with the company.