Pros
The employee discount is great! You can also communicate with vendors (particularly software venders) and get AMAZING DEALS on gear! I have about $2300 worth of pro level software I paid absolutely nothing for, and I'm sure other employees have even more. If you have an awesome crew and store manager, the job is somewhat more tolerable.
Cons
Big work load with little pay. The expectations of corporate are unrealistic. The employee discount is awesome but you rarely make enough money to actually use it. The entire culture is focused around being condescending and passive aggressive toward employees. You deal with tones of idiot customers. Working here makes you jaded and drains your passion for music. They USED to be very lenient with gigging and touring but labor budget cuts have lately made it more difficult for managers to accommodate those requests. The commission structure is an absolute joke! You have to SERIOUSLY break your back to make any kind of descent pay check (which is most sales gigs, but this one offers exceptionally awful pay). Sales guys are not valued, viewed as extremely replicable, and treated like crap.