Salesforce.com is a great place to work if you are a hard-working top achiever.
Pros
It's great to work in sales for an Industry leader, they also have a great product and pay their employees well - especially if you're a top performer. There's also a lot of flexibility - if you are striving for work-life balance, you can achieve that. If you want to make as much money as possible, there are ways to do that as well. Whatever motivates you, there is opportunity for that at salesforce.com. The company is also growing very quickly making it a great place for career advancement and opportunity
Cons
Company is growing into the "large" arena and there is more red tape than there was previously. It's also a very competitve environment - so depending on your tastes and performance it may or may not be a good thing - i.e. if you're a lazy person with little ambition, this is not the place for you