Pros
Constantly exciting work for research scientists, with a practical minded leadership team that ensures that the company does well. Has all the perks of working at a rapidly growing start-up (although I would not call Q-CTRL a start-up anymore) - flexible work environment, significant scientific impact on projects you get to work on, lots of room for growth and a fair amount of independence. Compensation and benefits are very competitive for the quantum computing industry, and are reviewed regularly to remain competitive. Also lots of company sponsored opportunities to gain exposure at academic conferences and other industry events. Overall, employees have a sense of being well taken care of. Mentorship is excellent and you'll certainly learn a lot about quantum computing in the real world working here. I highly recommend working at Q-CTRL, especially if you are a young scientist interested in quantum computing, looking for a chance to have a lot of impact while being well taken care of.
Cons
Nothing significant really. Some minor things: The US office is small and has a bit of an ad-hoc feel. Could be a bit more diverse; company seems to be making an active effort to remedy this. More of an industry problem than a Q-CTRL problem. Company is growing aggressively so major projects can sometimes pop up with very short timelines. That said, work-life balance seems to be a high priority for management, and you are usually given time-off / compensated accordingly for periods of relatively intense work.