We bought a new 2000 Sprinter 25RKSL 5er (rear kitchen, one big slide) and drug it all over the lower 48 states for over 10 years. Ours had upgrades such as gelcoat siding, day/night window shades and 15k AC. It was almost perfect for our needs - two old folks and a dog or so.
We broke a spring early in the life of the trailer, so Keystone replaced all the springs with heavier-duty springs. No problems after that. And like all RVs, it came with barely enough tire weight capacity, so we blew out a couple of trailer tires early on. So I upgraded the tires from ST205/75R15C to ST225/75R15D. The new tires required wider wheels, so we replaced the stock fancy chrome 5-inch-wide trailer wheels with cheap 6-inch-wide trailer wheels from SouthWestWheel.com. With the new springs, tires and wheels, we never had another tire or suspension problem.
Darling Daughter is now living in that 5er full time in Austin, and it seems to be doing fine after 12 years. If I needed a new 5er today, I'd not hesitate to buy a new Keystone Sprinter Cooper Canyon. I don't know why they added the name Cooper Canyon. I thought Sprinter was fine and dandy.
When we decided to buy a TT last winter, the first brand we considered was Keystone Sprinter. But the lightest TT they make has a GVWR of 8,800 pounds, and we required less than 7,000 so we could safely tow it with our F-150. So we had to shop other brands to find our Skyline Nomad Joey 196S with a GVWR of 5,600 pounds.
Grumpy ole man with over 50 years towing experience. Now my heaviest trailer is a 7,000-pound enclosed cargo trailer, RV is a 5,600 pound Skyline Nomad Joey 196S, and my tow vehicle is a 2012 F-150 EcoBoost SuperCrew.