I have had a few issues which I can speak to; however, they key point here (and I'm sure many others will echo) is that I have NEVER regretted the purchase of this car. It is a joy to drive and I look forward to (and even volunteer for) every opportunity to drive it. To be honest, I'm somewhat more demanding of Tesla than I have been with other cars, i.e. my expectations are higher and I want things to be perfect. If I compare with other new model cars I've owned, they (Infiniti) had multiple re-calls, some of a nature that suggested some safety concerns. Tesla have had few if any serious issues - my issues are typically niggling things related to the pano roof or moisture in rear lenses etc. I have reported a few software bugs but to be honest, with other cars I wouldn't have bothered as they never seem to get firmware updates. With the most recent Tesla software update I saw at least a couple of software issues disappear without any service call required.
Early on in the P85D I did have a warning message that gave me some concern. Tesla were able to remotely diagnose this and sent a ranger who was in the vicinity to meet me at the chinook mall (I was at a movie) to check the front motor to make sure there were no coolant issues. To be clear, Tesla are not always able to be as responsive as this but this is an example of the type of service they aspire to when something major might occur. In the end, there was no obvious issue and I suspect this was a software anomaly; however, to be safe, they shipped the car into Vancouver and replaced the entire front motor. I had a rental car for the duration. When we get a Calgary Service Center, I'm assuming that there may be replacement Teslas available when cars are in the shop too.
In summary, I think Tesla do have room for improvement but they have so far made up for any issues I've had by regular appointments with rangers - usually in my garage. The service center for Calgary has been a long time coming but I believe it is coming and things will only get better from there. I doubt you will ever regret your purchase either!