His is an amazing beauty blender dupe and is a quarter of the price. It blends makeup flawlessly, cleans well and is pretty durable. I've been using mine for about 3 months and I wash it once a week. I just got a new one, but my old one still works well.
I think that it is an excellent dupe! The beauty blender has that rounded bottom, while this one has a flat bottom, but I just use the sides of the Real Techniques sponge and it works wonderfully. (To be honest, I prefer this sponge to the BB.)
It's basically the same results in the end. But there's a few thing i didn't like the technique sponge is soft but not as soft as the beauty blender so. But the technique sponge has a flat side that I love it makes it really easy to blend in your under eye