Vantaggi
The development team is lead by Daz, one of the founders, who is technically hands-on and actively contributes to the code base himself. There is a good atmosphere within the dev team, where people are happy to help each other and everyone's ideas are taken seriously. The same applies to the interaction with other teams. Everyone has a "get stuff done" attitude and there is no red tape. OpenRent has a great culture. People have lunch, play sports and go for company nights out together, yet there is never any pressure to join. Your work life balance is respected. While everyone works very hard and people will sometimes stay late, there are no ridiculous hours.
Svantaggi
The office is located in Brixton, which isn't super central. But it's only a 20 min tube to central London and you travel against the flow, so I haven't found it too bad. Depending on where you live this will be either a pro or a con.