We have a beach tent. I like it better than an umbrella, you don't need to keep moving it around to get shade, and it is easier for babies/toddlers to nap in.
We have one but don't use it. We use a small ez-up type tent that is compact and fits into a backpack case. We use it for the beach and a lot of other trips.
My ILs have one of these and they're great. After my MIL has had several cancerous spots removed on her face, she will not be in the sun. The kids nap in it and it's great to have lunch in, stuff isn't blowing away.