I bought two of these to make my own desktop 3 x 5U unit and was quite happy with this for the price. The rack holes are punched out and the end finish is a bit rough and ready, but not too much of a problem since they are going to be hidden when your rack unit is full. You could polish them up if you wanted to.
These are quite easy to cut by hand with a hacksaw and then can be filed smooth. Neither piece's end was the 'start' of a rack unit meaning that there was quite a bit of waste, so make sure you allow for that. The other edge of the strip is completely blank so you are free to drill and screw where you like.
Overall, for the price these are great and I would buy them again when I next make a unit.
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