I started out originally with the Pulex brass squeegy which does the job but is not exactly ergonomic and the channels bend very easily, later I got a swivel handle which was much nicer to hold especially in cold weather. Later I bought into the Unger ergotec stuff, it looked smart and professional and I liked the idea of channels which wouldn't bend when I dropped the Squeegy. (The last bit turned out to be only partly a reality) I have to say right away that I never really felt the love for the ergotec, although I have used them for years and regard them as a well made piece of kit there was always something not quite about them for me. So when I came accross the Sorbo 3x4 on Youtube a year or two back I thought, I want to try that, and I'm glad that I have finally gotten around to it. First impression is of a nicely made, slightly chunky, man sized squeegy which feels solid in the hand compared to the Unger ergotec which to me feels slightly dainty. (I have quite large hands) The angle of the handle to the rubber is slightly different, the Unger makes you hold your hand further out from the glass which I have always struggled with, I naturally like my hand a little closer to the glass so the Sorbo scores here for me personally but others will see this differently. Obviously this is a swivel handle which is slightly heavier than a non swivel but not much, again some will like swivel others wont. The big difference in the handle is the way the channel clips in which is very quick and positive so tightwads can change channel in a flash. Also there is a bar on the back of the handle to clip a lanyard to, very useful for working at height/absailing. The channel is very different to any other, aircraft grade aluminium with non scratching plastic end plugs and four different slots for the rubber to slide into. I do the inside of a car showroom which sometimes involves working very close to some expensive motors, this has always worried me as the Unger s-channels could easily put a nasty scratch in the paintwork if I got too close to one of the cars, the plastic end plugs on the Sorbo would be a lot more forgiving. Being able to slide the rubber into any of the four slots is pure genius, you can compensate for a peice of glass not being flat, i.e large showroom/shop glass which flex as you clean them, should also help when using a squeegy on a pole as the rubber will stay in contact with the glass with less pressure. The channel seems to me to hold the rubber slightly better than an Unger and the end clip is way better than the awful plastic Unger ones or even the old brass Pulex type. There is also the possibility of sharpening the rubber and re-using it which can cut down on running costs, though the official jig for this is rather pricey. The rubber is top quality, in my opinion the best on the market. So to the big question, is this a superior squeegy? Yes I think it is, it is a serious squeegy for serious professionals. Does this mean that everyone should rush out and buy one? not necessarily, if you are using a 12" to 14" sqeegy and are happy with it then no need, but if you use an 18" upwards or are not happy with what you've got then it has to be worth thinking about. Obviously this is all just my personal opinion and I do like to work with quality equipment.