Pros
The most obvious thing is the culture, unlike any corporate atmosphere I've ever personally witnessed and has the feel of what tech companies in Silicon Valley are rumored to be like. At work, the atmosphere is fun and relaxed, with open break areas and collaboration/testing areas. They are open to employee ideas and feedback, and some ideas get developed by engineers and implemented into the product offerings. Company-funded happy hours and in-office games and competitions keep things fun and fresh, and there is a yearly company retreat.
Probably the best thing about here is the people. This HR team has done an amazing job of hiring not only good candidates, but ones that FIT WELL with the already established employees. The more you work with them, the more you get to know them and find things in common, and the better you get to like them. I have formed several deep friendships since working here, and multiple weekends a month people are looking to get together outside of work to just have fun. When you work with your friends, you truly care about helping one another out, and that leads to great quality and highly efficient work results.
Finally, if you work hard and offer results, there IS room for advancement. The training process is intense as there is a lot of information to digest. Once fully trained and established as self-sufficient, additional responsibilities are available. I've made it clear that I'm willing to help wherever and whenever needed, and that is really valued here. You have the option of where you would like to specialize, and which additional responsibilities you would like to take on. My responsibilities have shifted quite severely in the almost 11 months I've been here and it has me very excited for the years to come. Forging your own path is still an option at Alarm.com as they don't put you in a box. I'll be sure to update this as my career advances, to keep the insight fresh.
Cons
Personally, I have a long commute, but that is nothing to fault the company for. Nothing really comes to mind off of the top of my head, and if you really have to sit down and think hard about what you dislike about your job, that speaks volumes as to just how satisfied you really are.