Where to start....
Very immature office environment, which is bound to happen when the majority of your "management" team is still in their 20s. Even more so when quite a few of these managers apparently think they're still in high school. There's even a mean girls club (which includes a guy or two) that are either really bad at their jobs or too busy gossiping to actually do their jobs.
Getting promoted here is actually pretty easy, which sounds like a pro right? Well, it's only easy if you make friends with the right people. Producing and actually driving sales is a much slower path to promotion, especially if (god forbid) you don't hit your "60/7" every week.
Commission structure is actually good from a pure income standpoint. However, you'll have to work 10x harder to make that money because you only make decent cash by gouging your clients and low-balling your candidates, which makes client/candidate retention very difficult. You'll often be your clients last choice, as you're 25-40% more expensive than the competition if you actually want to make any money, and, despite what these people like to think, there is nothing different or better about the service being offered than that of the competition.
Also, keep in mind, the competition will often have 10x the resources that you will here. From a technology standpoint, this company sits somewhere around 2004.
You'll get placed in a market oversaturated with sales people, meaning you'll have 4-5 sales people in a single city such as Atlanta, Boston, Houston, etc. Combine that with the gross lack of recruiting support (5 sales people at least to every 1 recruiter) and you'll be lucky if all your job reqs actually get worked. FYI- they won't.
The biggest issue I can see present day is upper management, and the owner in particular. This person shows up a few days a week, looks at some outdated, mostly irrelevant "stat report" (irrelevant in regards to what KPIs good companies actually track and look at), and then proceeds to blast employees either to the management team or, at times, directly to the individuals, often in a highly unprofessional manner. Most recently, this person has actually gone on to social media to publicly denounce both current and former employees as average and/or lazy people, while also implying that these people will never be successful no matter where they work. Absolutely embarrassing, and the owner should be ashamed. That won't happen though. Ego is too big to ever admit fault or take accountability for the fact that a substantial part of the core of employees that helped "triple" your sales in the last 5 years has walked out the doors because of they way they were treated.