Before I bought my trailer I did a ton of research. I scoured horse forums of all types looking at different information on different trailers. I settled on a Brenderup because I could tow it with my RAV4.
My 2007 Rav4 has V6 engine, 269 hp, 181" long, 104" wheelbase, and a towing package for 3,500 lbs.
Tongue weigh is different than an American trailer so it does haul with my Rav4. I generally only haul 1 horse - I hauled my 15.3 former QH that was 80" long - he is a big boy. I have never had trouble hauling him, Sarge or Biscuit in the trailer. I have hauled two horses in it for short hauls with no trouble at all - but when I haul both I am hauling 45-50 mph or less. If I am just going up the road 4 miles to the park I am on the service roads so going less than 40 but even on the highway hauling the horses I have never had trouble stopping it. It doesn't push my Rav at all. I hit the breaks - Brenderup hits its breaks and we come to a slow smooth stop.
I have had an IDIOT pull out in front of me on a curve when I was hauling Red. She pull up from an entry ramp on the curve (really really bad civil engineering at this point) and putted. I had to hit my brakes HARD - I was scared to death we would have a problem...no problem at all. I felt the B'up bump bump bump lightly on my ball and that was it - no swaying, no fishtailing - nothing but following the Rav back to the barn.
A friend has trailered with me twice to the local park. Her TW loves the B'up and wants to go with me whether he came with me or not! She said she is very impressed by how it hauls and several other local horse guru's that have been with me hauling have said the same thing - they were skeptical but changed their mind when they hauled with it.
Do your research - look at each trailer and check out reviews on forums and see if there have been problems. Choose your vehicle carefully. I would love to have a 3 horse slant with a LQ. One of these days I will get one but I won't ever get rid of the B'up. I love it!