Pros
I've worked at four conference companies in my career and this was by a mile the best. The company hires, for the most part, brilliant people who are driven, energetic and good at what they do. The office has a strong work hard/ play hard ethos and thanks to the company's guesting strategy you don't have those horrendous on site delivery issues like at other companies, where you have ten sponsors and even fewer delegates! For the most part the company listens to ideas from all corners and encourages small innovations. I have nothing but praise for the owner, Rick Worden, who is a brilliant CEO and supportive of his senior managers around the globe.
Cons
It is a sales environment, so it is constant high pressure and results orientated. This isn't for everyone, but typically it's the best who thrive and the worst who leave (and leave stroppy comments on glasshouse...). Can be inconsistent with on site delivery depending on current business results.