I checked out the Kraftsman trailers and went with Kaufman instead for a couple of reasons.
Kraftsman had one close to what I wanted on the lot, but it had some issues -- weld quality, etc wasn't up to par (some welds literally looked like they were starting out a new guy and giving him something to practice on). Told me I didn't need or want brakes on two axles as it was nothing but added trouble (I think they told me this because the one on the lot only had brakes on one axle and he wanted to sell it).
When it came time to price a trailer, the guy worked up a price, caught a mistake, gave me another price (higher), called to me as I was getting into my truck, as he had forgotten something else, and added again to the quoted price. Got a call on the way home, yep, yet another error, this time he had added it up wrong and gave me yet a third price. Three different prices within fifteen minutes, they should have their act together better than that.
I priced my Kaufman off the website, went there in person and salesman gave the exact same price, ordered it, and it was built and ready to pick up 12 days later.
FWIW, Kaufman is a much larger operation, and appears to much better managed from my experience.
Also you won't regret going with 20'. Not too much extra weight or cost, no real difference good or bad in towing. Pays off when you pick up 20' sticks of steel.