I moved my horses to a farm with a small Friesian breeding program (The Friesians of Freedom Farm, website is a little out of date) this year. I had been trailering in for lessons with my Fjord for two years, so decided to make the move.
I think so much depends on the quality of the animal and the quality of the training (not just for Friesians, for any breed). The Friesians where I am were carefully selected and imported to build the breeding program, and the foals by their main stallion and out of the Dutch mares are a home run, every time.
The trainer and owner of the farm studied with Ray Hunt, so the training approach is different than most dressage training. Each amateur who has bought a Friesian from this program has started the horse themselves, and this is my next big goal in life. I could do it with another breed, but the Friesians make it easy. I should also note the breeding stallions are ridden in groups just like geldings are. We just had a mini-clinic over the weekend (I was on the only non-Friesian!), and even with my mare in heat both stallions were impeccably behaved. I think that is more about how they are handled and trained rather than the breed itself, though.
The horses at this farm don’t have the health issues others have mentioned, which I suspect is due to very careful selection of breeding stock. They all have the “puppy dog” personality and get very attached to their person. I have been working with one that “needs a person” for a couple months, and he hears my voice and comes trotting up to the gate. My Fjord and Trakehner, whom I’ve owned for years, watch from a distance…
My only reservation and why I haven’t purchased one of the foals already is their height. I really, really like 14.2-15.2 size range, which is too short for breed standard and not what is produced from this breeding program. I have been thinking about getting a foundation-bred Morgan filly and eventually crossing her with their sport stallion, but I’m still thinking through all the options.