Unit arrived quickly we'll packaged. There were no install instructions but online you can find adjustment procedures and the physical install is easy. The original started making erratic size and not quite frozen cubes which indicated the thermostat was dying. The thermostat is available to buy but the least expensive outlet costs more than this tray assembled. There is an adjustment for cube size under the front cover. You simply remove it with your fingers buy pulling forward from the bottom of the cover and angle it up. Try it before installing and leave it off until you're happy with the size cubes. Start out with the screw adjustment to the left of center there are arrows indicating which way to turn the screw. Don't adjust until you get a couple trays full as the size depends on how long the water runs and water pressure is a factor. Too high of a pressure and your adjustment guess may lead to a flood. Go slow and put the cover on after s few days when you're satisfied. Our supply comes from a revrse osmosis system so it is low flow and with the factory adjustment the initial trays were small cues and only four and five. I was able to adjust it to eight large cubes and a generous over night supply. I'm happy to say that ice container stays full giving enough for iced tea all day! Glad I purchased this tray. I said better than the original because the original let the basket over flow and we sound up with cubes all over the freezer and some even fell on the floor. A complaint to Frigidaire got us a small plastic flap to attach to the shut off wire. This tray comes with a shaped wire which so far works without added fixes.