Pros
* You have the opportunity to work on projects for some amazing, well-known clients. With the focus on non-profits/NGOs and higher-ed clients, you get to work with organizations that are trying to make a positive difference.
* There are numerous opportunities to learn new things if you're willing.
* The company sponsors multiple DrupalCons and other events every year. All employees are invited to attend DrupalCons at the company's expense.
* Since Trellon is a virtual company, you have some flexibility in when and where you work, as long as your schedule remains somewhat consistent and you get your work done.
* Competent PMs that understand the basics but also know their limits. The project managers are good at what they do and understand enough that they can answer some simple questions from clients on their own but they aren't afraid to loop a developer into a conversation and let them respond if needed.
* Individual employees are recognized and appreciated. They aren't just treated like nameless, faceless cogs in a machine that can easily be swapped out for another.
* CEO is very hands-on. He's not the type that just sits back collecting a paycheck and attending chamber of commerce meetings. He's also willing to step in when a project looks it's having problems and help correct the course to get things back on track. Unfortunately, some people who have posted reviews on this site seem to be offended by this and view it as overreaching.
Cons
Since Trellon has employees all over the world, working with some of the foreign developers can sometimes be challenging. Perhaps it's just a matter of cultural differences, sometimes they need to be provided with more explicit/detailed instructions than some of the other devs.