I've used Interactive Brokers a long time and like them. They're very tech-oriented and automated and I do everything online including running reports and downloading those reports. Hardly any paper ever for my main account. If you are quite computer literate and have a good computer my experience is that they have excellent functionality and usability. Good features include international access, currency conversion and option facilities.
I see they now offer RSPs. They didn't seem to do that in the past. I have my registered accounts at other brokers so have no experience with theirs. I see they do say RSPs are subject to the usual minimum fees. Here's a link to some info on their website about opening an RSP: https://www.interactivebrokers.ca/en/index.php?f=13406