I posted in the thread comparing Sunshine and Mears, but wanted to add my comments here.
We booked Sunshine with the kids fly free promo because, with a family of five, it was a no-brainer price wise. Service was excellent and timely, both to and from the airport. There was a bus waiting for us at MCO that was moving within 5 minutes and our return bus was exactly on time.
That said, they assigned us a return time of 6:35am for a 10:00am flight. I understand they have to account for possible traffic, multiple pick ups, etc, but for our domestic flights with precheck, the early pick up was entirely unnecessary. I tried to email to get it changed but received no response (this was over the holiday weekend). So, we ended up through security and twiddling our thumbs at 7:15am when our flight didn't board until 9:30.
In the future, I would not hesitate to use them outbound, or if car sizes and car seats prevent the use of rideshare. But, now that our girls are old enough to use super slim booster seats, we'll pay the extra few dollars for a Lyft XL and 90 minutes of sleep.