The engine was what we expected.But the keys was missing . we pay for the opener gate and two keys .we only received the motor no the keys.This Gate Opener is well designed as far as the motor, mechanicals and electronics. It operates well, with no hesitation, or noise. I've deducted a star because I felt the mounting base plate was somewhat flimsy sheet metal, with four mounting bolts for the opener tack-welded to it. Sure it might last ok, but who needs a problem down the road if the tack welds should fatigue and break, so I made my own.I contacted the manufacturer and received a professional and courteous advice. I was a bit hesitant to buy such a small unit. As a matter of fact I have been using it for two years now with no issues to speak of. This opener is really impressed by everything about it. I definitely would recommend it. The price cannot be beat.It works perfectly!I have 2, 26 feet gates, and they are pretty heavy, but this gate opener does the job without any problems!It's powerful, simple to install and it is really quiet!The only minor (Really minor) issue is, the range of the remote controller: It's not as lengthy as you would like, but it works well and does the job!!5 stars! and worth it!After initial installation, the unit worked without flaw for around 3 months. For no apparent reason, it stopped working. Talked to Aleko, and they were very nice and sent out a replacement unit. Out of the box the replacement unit did not work at all. Second replacement unit worked after installation, but only for around 5-6 WEEKS!! I have a very well built sliding gate that rolls on ball bearing wheels, very little effort to close even by hand. I built a "shed" over this unit after the first fail to try and lengthen the lifespan of this unit, obviously to no avail. This is a total waste of time and money! The old saying you get what you pay for is always right. Don't waste your time or money on this junk!Unit worked for 3 days after it was initially installed and then without warning it stopped closing. Spoke to Aleko and got a replacement board. Installed the board and it worked for about 9 days and then stopped closing again. Currently waiting on a replacement limit switch as tech support suspects the main board and the motor aren't the problem. I am so disappointed. I just want the thing to work and give at least a few years of good service like the one it replaced. I may post an update if it ever works properly.Update November 10, 2017: Unit is working fine since I replaced 2 boards and a relay module. Must've just been a defect in something, but I've been pretty happy since then!got it mount a month ago and it is still running. So far so good.As expected