An absolute must if you have a stair carpet (or pets?)
I haven't had the chance to use it a lot yet (hence the 4 stars) but so far does the job as expected. I had a similar attachment with my previous vacuum (although it came with it and I didn't have to buy it as an extra!) and also have one for my hand held Dyson. It feels slightly lighter than the others but is sturdy enough and runs relatively quietly even at maximum suction. I don't have pets but consider it to be a must if you have a stair carpet - the large floor head does not do it for me on stairs.