I've only used Cartier, and I can't recommend them. They were half an hour late to pick us up on our return trip - and only that after I called them when they weren't there at the appointed time. And I'd called the night before to confirm. - Then, although we were already running late, the driver took the longest way to the airport I've ever seen. It took nearly an hour to get from BW to the airport. We really had to hustle to make our plane. Oh, and we were missing a booster seat (a parents nightmare) and one of the seatbelts was broken in the van.
Although I do think ALL towncar companies have good trips and bad trips. I may have just gotten unlucky and gotten a bad trip.
(To answer the question about bleeping out some companies names, my understanding is that some companies have misbehaved on the boards is such a fashion that the moderators have decided this is an appropriate way to deal with them).