Well built little unit. Not stocked in most stores, but somehow I found one at a nearby store even though it said online they didn't stock it.
Right out of the box, I had a slight problem in that the trigger/cable could not put enough pressure on the spray nozzle to get any spray. This was easy enough to adjust using the screw on the cable clamp. After this adjustment, it worked fine. I used it to stripe a parking lot of about 40 stalls. If you are careful, it's easy to make consistent straight lines. Given that it's a low pressure spray, expect that the line edges will be a little less sharp and crisp than professional high-pressure stripers will do. You won't want to use this machine on a windy day, if you want good results, even though there is a little wind guard underneath to attempt to prevent this problem.
Be warned that it comes with hard tires, like a lawn mower, which I found to be too bumpy on an asphalt lot. I thought about replacing with pneumatic tires, but ended up simply wrapping each tire with thin strips of rubber (cut up tool drawer liners) and cinching with a strip of electrical tape. This made the machine glide MUCH more smoothly over the rough surface, making it easier to operate and producing better lines.
One other thing to be aware of. Due to the location of the spray can relative to the front wheels, you will not be able to paint right up to walls or other tall obstacles. So if you have lines that meet a wall, you will have about a 1 foot gap. I didn't think this ended up looking bad, but you should be aware of this.
One other tip I learned: since it's a little hard to see under the machine where you are spraying, it can be a little tricky to know where to start and stop spraying. Use roofing shingles laid at the line ends to mask off where you want to start and stop. These worked great to make crisp line ends and prevent me from making errors.
There is a "center line" mark on the front of the machine, and this might work okay for re-striping existing lines. But it's a little high off the ground, so the accuracy will depend on where you are standing relative to the machine. Since I was striping a lot that had never been done, I preferred to snap a chalk line offset 10" from the desired lines (to keep the chalk out of the area to be painted). To accomplish this, I added a small strip of metal which hangs out the left of the unit, very low to the ground. The mark I placed on that strip made it very easy to accurately follow my offset chalk lines.
Be warned that the claimed coverage on this paint is a little optimistic. Of course, this will depend greatly on the surface being painted, and how thick you want your lines to look. I achieved about 80 feet of 4" line per can. Your mileage will certainly vary. I also found that the spray nozzles varied a lot from can to can. So I ended up using the same nozzle on multiple cans once I found one that produced the desired line width. That caused me to have to clean the nozzle a few times with mineral spirits.
Overall, a good machine that produced pleasing results with the modifications described. I can't say how much different the results would have been if I had used the machine completely unmodified.