I have mixed opinions on this item. I have a large, gas-powered pressure washer but it's just not convenient. I wanted something a little smaller and easier to get into operation. I was hoping this was it.I received the first one and hooked it all up according to the instructions. Turned on the water, plugged it in. Turned on the power and all was good for about the first 30 seconds. Then, it sounded like the motor was running fine but the pump wasn't running and there was no water coming out of the hose. I released the trigger and it continued to run...it should shut off when the trigger is released.I double-checked all connections and reset everything. Same thing. Motor running, pump not working. I called SunJoe support. The girl I spoke with just sounded like she didn't wanna be there at all. However, she sent me a UPS return label and said a new machine would be sent right out. I did receive the return authorization and UPS label in my email. However, it required me to take the unit and drop it at UPS. The email also stated a new machine would be shipped to me once the old one was received and inspected. If it didn't pass inspection a new machine would be sent.So, I returned the item to Amazon. A new machine was shipped almost as soon as I completed the return request online on Wed evening. I got the new machine on Fri. And Amazon gave me the option to have UPS pick up the first machine. Way better solution.I went thru the assembly and hook up on the new machine. Once the water was connected and turned on I pressed the spray trigger (without turning power on to the machine) and let water run thru it for a few minutes. Then I turned the power on. It kinda made the same noises the first one did...like the motor was running but not pumping. But it did shut off when the trigger was released. So, I just held the trigger down and let it run for a few minutes. I noticed it was vibrating quite a bit. After a few minutes the vibration stopped and motor/pump sounded much smoother. I ran it for about 5 more minutes just trying it out in a few locations. It seemed to be working fine.With just my short time owning and using this machine there are a few pros and cons:PROS: Good size and weight and easy to move around and maneuver. It's convenient to attach the high-pressure hose and the water supply. The connections are plastic but seem to work OK but I do have some concerns about long-term durability. The various nozzles are handy and attach/detach easily from the machine. I like the length of the wand. It's very easy to use, even for a novice pressure washer owner. Just remember to ALWAYS turn on the water before turning on the machine. It's a nice looking machine and has handy storage wraps for the cord and hose. The storage slot for the wand works well. I hand-tightened only all connections and no leaks anywhere.CONS: There is no way this thing produces 2030 PSI. Not even close. So don't expect this to be powerful enough to remove heavy stains from concrete or something similar. The high-pressure hose is short. 20' isn't even enough to get around a compact car without moving the machine. The electric cord is plenty long enough...once you get it untangled. I don't know what they do to the cords at the factory but I tried my damnedest to unwind it without it getting knotted to no avail. What a PITA it is to initially unwind the cord. If you want to change from one detergent to another there's no way to empty the detergent tank without just running it empty and wasting water and detergent. So use less than you think you need when you start a job.**UPDATE: 03/24/2018***I used the SunJoe SPX4000 today to clean the deck. The deck is a synthetic/plastic type and was badly stained. It's not large, about 10x15.When I initially started the pressure washer I had the same experience as yesterday. It sputtered, spit some water, vibrated and just generally didn't work for the first few minutes. Finally I got consistent water thru the machine but at a reduced volume and pressure level, even on high.Then, after about 3 or 4 minutes, it just shifts into gear, smooths out and sprays water at a consistent pressure and without all the vibration and sputtering. After that it worked fine for 30 minutes. I took an hour break or so to take care of something else, came back, switched it back on and it ran perfectly fine. I have no idea if that's normal. It almost runs like a gas machine with bad gasoline in it.But, it did a very good job on the deck as you can see in the photo.