I wouldn't put them in the extremely durable class...but you can usually buy them for less than $10 so it's not too big a deal. I got some for stocking stuffers from ToyEast a few years back and they were ok. You could get 20 minutes flying time on a calm day. Vectored thrust does take getting used to. Megatech does not have the best reputation for selling products that fly...but this one will leave the ground.
Cptn.K