Do these vacuum brush attachments actually help or are they just a gimmick?

I was looking at my feed and saw this video of someone having like an attachment that you could just put on your vacuum so apparently the fur got sucked up instantly after you brushed, so it wouldn't cause a mess, you can also do like 3 different brush attachemnts on it like a slicker rake and deshedder, but now Im wondering if this actually works or if it's just a gimmick

Look up Groomi I think thats what they're called