I used Cricle S and loved them! There are 2 companies with the same name. I used John from Texas (not the company from Florida). I have the phone number in my cell phone if you want it.
They moved our 2 horses from Ohio to Wisconsin. I spoke to over a dozen companies until I decided on him. He showed at the time he was expected, called that evening when he stopped for the night, again in the morning when they left and showed up at our new place on time as well. We got a box stall in the trailer for each and they showed up fresh, lively and very happy. I was warned that many horses can get dehydrated on a long trip, but they didn't lose a single pound of water weight. Our horses stayed on the trailer overnight because they had the box stall already. They have farms set up across the country where they stay and let the horses out into a paddock if the trip is long enought to warrant it.
We were allowed a single crate for each horse. We used the largest sized tupperware containers we could find and our english saddles actually fit in them without a problem. They stopped every 6-8 hours to allow the horses to drink and relax. I was very very pleased with him and would use him again in a heartbeat.
One thing I found when I was searching - since we were not travelling a well used route a lot of companies put us on a wait list and would only book it if there were more horses going along the same route. I was very frustrated because I asked how they ever booked a route if there had to be a horse already booked before another one could be added. How did the 1st horse ever get booked? In the end, they have routes that are busy (such as to kentucky, florida, etc...) and anything outside of that needs to be full to make it worth the trip for them. I don't know where you are going to or from, but give yourself plenty of time to book it in case you run into the same problem I did.