I used Lyft to get to and from SNA in the past and as others have said, it's a pretty easy process. I've have a bad driver once (he couldn't figure out where pick-ups were at SNA and ended up going to departures twice before giving up and cancelling the ride, but I think he's the anomaly), so there is always the possibility of issues, but for the most part, it's been quick and easy (as others have said, the wait can be anywhere from 5 to 20 minutes).