First of all, take a look at all of Mondo's positive reviews and ask yourself if they seem genuine. You'll see they're all brief and uninspired, and that is because Mondo asks its employees to write a 5-star review within weeks of their first day, and the person who hired them gets a bonus. So look past that, if you will, because this place is no Google.
The hours here are long -- insanely long. 10 hours every day, minimum. They'll tell you this is the "industry standard"... it's not. You'll be reprimanded for leaving early (on time). Most people work 11 hours daily.
You'll be micromanaged to death. Like, your mom didn't watch you this closely when you were a toddler. Every day there is an email with the ENTIRE COMPANY attached that will show how many people you've called, meetings you've booked so far, etc. And everyone sees it. If you haven't made 25 calls before you walk into the daily "pipe" meeting you can consider yourself on watch. If you don't make your 100 calls every single day, don't even bother showing up after your first month. Your managers will talk down to you, borderline harass you, and beat you up mentally until (like many others) you're crying in the bathroom and wondering why you'd ever thought working here was a good idea.
"unlimited time off!" -- LOL. No one here takes time off. They'll look at you like you've got 3 heads if you even ask for more than a day.
Turnover here is absolutely insane. My manager mentioned to me that they'd turned over the entirety of their company by third quarter last year. So more people had left the company by September than were currently employed.
Overall, they value quantity over quality, numbers over people, and they treat employees accordingly. They'll try to lure you in with pool tables and ~chalkboard walls~, but once you're in you will be miserable. The only people who are remotely successful here are insane workaholics, super driven and smart. And if you're that good, you deserve much better than to waste your time here. Go work for a company that values you.