I have used this charger for my Samsung Galaxy Ultra several times now.It is extremely fast charging. The cords retract back into the charger, but when pulled out, will "lock" in place, so they won't retract while charging. When done, just a quick tug & they unlock & retract again when not in use, so no annoying charging cords always getting in the way.The unit itself is somewhat larger than others, but it has multiple options for charging so it needs to be larger.The cord is FLAT, which I like. It drapes well & doesn't get all kinked up.My 20 yr old son said it looked "cool", which is high praise (although he didn't care for the yellow color I chose). 🙄He was also impressed how quickly it charged his phone from 5% to almost 45% in about 15 minutes. All in all, this is a great charger. Well worth the price!