Pros
I have never worked for a company that is so transparent or honest with their staff. Right from the board down - people are honest about what we're trying to achieve, how we're going to get there, and how far away we currently are. Apart from working day in and day out with a great product that I believe in, I'm also fortunate enough to be surrounded by a team of intelligent and ambitious individuals. The leadership is heavily focused on progression and personal development - and there are ample opportunities to take ownership and show initiative. Add to that the dart board, beer fridge, free team lunch on Tuesday's and Thursday's, standing desks, free fruit/snacks, and share options - and you have a very rewarding and fun place to work.
Cons
Being in a start-up can be hard at times, staff members will inevitably leave or be let go - and this can create gaps (or opportunities depending on how you look at it). It's not unlikely that after just 6 months you will have a lot of responsibility, and it's not the kind of job you can just leave at the door. You need to be prepared to work more than the standard 9-5, and proactively think about how you can make a difference. Don't join Guidebook to just be another cog in the wheel - you'll quickly get rusty!