Pros
My first entry into the IT world was through ActivePDF. I spent four years at this company an I feel I owe much of my success to the growth I gained while working here. At the time, the CEO took me under his wing, and while busy, helped mentor and empower me, not only development wise, but in all aspects of business and life. I can't say enough good things about this place. I ended up leaving because I had basically mastered the developer support game and moved on to being a developer - which I had a huge leg up on the field having worked in developer support for 4 years. If you're looking at getting into the IT field, or are looking to enhance your IT skills, this is an amazing place to do so.
Kontras
I can't think of a con, but if you're not willing or eager to learn this is probably not the job for you. You get the opportunity to wear a lot of hats so you need to like that role.