they're actually ok cranks for what they cost, generic clamp on 3-piece, might be worth taking the right sized allen keys out with you in casde they work loose when they're new, keep an eye on the bearings too,
I've not used the bearings as I have better ones already in the BB, but they will do as a spare set
The only downside I can see is the crank bolts have a plastic end cap, where a smaller bolt goes through, I can see these getting eaten up pretty quick
But as you say for the money, they ain't half bad