Given the task definition and input, reply with output. In this task, you're given reviews from Amazon's products. Your task is to generate the Summary of the review.

Great size for large tablets, very light-weight, nice coating, inexpensive and simple. BUT the little tightening knobs will not hold the stand in place properly for more than a few hours, no matter how tightly I turn them and I can see that the knobs will inevitably break too soon as a result thereof. Whether a poor design choice or planned obsolescence, this design flaw makes it difficult to recommend this stand. I am keeping it because I need something now for my kitchen table, so I will see if I can modify it to work better for me.
Poor quality tightening knobs mess up an otherwise excellent stand