Extensively! What would you like to know?
Zero is 5 years now and I've had a close relationship with his breeder and her dogs since, my friend owns 2 females, my other friend has owned more than 4. Consistently, they're all REALLY SWEET. Very gentle, happy, smart breed, rarely too rambunctious or overwhelming with people.
They need a fair amount of exercise or mental stimulation to prevent boredom. Be afraid of a bored Samoyed. Crafty buggers can figure out how to get into or out of anything if they are bored enough to figure it out. Once came home from work to Zero
locked inside the cat cage. He had broken in, managing to keep it locked and intact, to eat cat poop.
Very drivey dogs in my experience prone to inappropriate and roughness with other dogs if not dealt with right away. Can't for the life of me get zero to stop "herding" Pit on walks, getting to a point where he injures him. My friend had similar issues with his males.
Grooming is a literal pain in the neck. Start to finish, Zero takes 4 hours to groom and then it's constant brushing until his next groom as he sheds constantly and all year long. He also has seasonal sheds where even MORE hair comes out. Black clothing is off the menu. Other Samoyeds don't have a coat as bad as Zero usually, but you can still count on constant brushing no matter what coat you end up with.
Smart breed, very fun and rewarding to train. They're not as independent as I'd been led to believe and in my experience are very willing to learn and to please.
That's all I can think up, got any questions?