Have used the midi tento on the beach, great having the sand bags as tie downs. Enough shade for 2 or 3 adults on chairs and several kids on a picnic rug. Stays up in windy conditions providing you really fill up the sand bags (as the instructions advise. Don't try to 'make do'). It is light to carry and simple to erect (the kids enjoyed helping fill the sand bags too!) Fairly pricey (the only reason it didn't get 5 stars) but got it on special so not bad value. Have only had it a couple of months and been used 4 or 5 times so can't comment on longevity as yet.
I would highly recommend this product. Far better than any other shade product I have tried for the beach. Stays up in windy conditions and looks great.