I just returned my ryobi 4 gallon to HD this weekend. I bought it a month ago on April 27th and got 3 uses out of it.
Let me preface this with, I'm only posting this just you are aware of an issue I came across and it's in no way trying to sway anyone's decision to not buy the sprayer.
Like some of you I'm already invested in the Ryobi line and thought it'd be best to just continue that instead of having another type of battery and charger to deal with.
I started to notice a decrease in pressure and it was significantly getting worse and worse and worse. When i first pulled the handle/trigger the spray would be powerfull and give a fine wide swath of mist using the fan tip. Within 1 second the pressure would drop to almost a stream due to low pressure. I checked from one end to the other for a clog or obstruction and couldn't find anything. I removed the nozzle, still ahd the same result, removed the wand and still had the same result coming out of handle. It was always an immediate strong burst, then just a trickle.
I had someone on here message me saying it took 2.3 minutes to spray a gallon of water in his Ryobi 4 gallon. When I tested, it was almost 9.5 minutes.
I'm not saying that the sprayer is bad, I actually really liked it and am still thinking about getting another one but, I'm going to explore looking at other options. Just 3 applications of liquid (GCF products) and it started to die just isn't a real confidence boost for me.