I’ve got a pair of similar cheap ones. Honestly…don’t waste your money unless you are a novice and don’t know how to start out of blocks. You are better off saving up for a better pair or waiting until you find a good pair on e-bay.
If you are worried about not being able to practice out of blocks then that is really only a minor obstacle. I think power out of the blocks is more efficiently trained through exercises like medball accels anyway. If you have a place that will let you use blocks every once in awhile to make yourself comfortable and familiar in them then you should be set.
