Pros
The only good thing about this place is the people. They're smart, nice and friendly. This creates a fun atmosphere. If it wasn't for the people, you'd want to quit this place every day (you still do).
Cons
The salary is well below standards, not only for the amount of work they make you do but compared to general London salaries. They claim to benchmark salaries but it’s unclear against what, it certainly doesn’t reflect industry standards. The hours they make you work is unsustainable, and the expectations are unrealistic. The company leans heavily on young employees (often on visas) who can’t easily leave, anyone else would walk out. They're hiring people but there's not enough space in the office. It always gets crammed and there's barely space if you don't come in 15 minutes early. They have a hot desk policy for everyone, except the senior people where of course no one can touch their seat unless you know they won't come in. The obstacles you have to climb to try to get a promotion is too drawn-out, there's multiple steps that takes half a year. And at the end you'll probably get rewarded with more work and peanuts for your salary increase. People would rather quit without anything lined up because the burnout of working here is real. I heard it used to be better when it was a smaller company, but the culture is fading away as the company is getting bigger.