I purchased this sprayer for recreational land and wildlife management purposes. I have owned (at the time of this review) the sprayer for about 4 months. I've run probably 25-30 gallons through it so far. I have used it to water some small scale micro food plots (just to moisten with water after seeding). I've primarily used it for mixing herbicides (glyphosate) for spot spraying weeds around new trees and controlling wood/field edges. It has been one of my top purchases for land management where bigger equipment isn't always feasible. In the past, I used 2 gallon sprayers and found the nozzles or handles clogging, leaking, or not spraying uniformly not to mention the seals failing. More often than not, I would have to carry two small sprayers into areas to avoid having to make multiple trips. In the heat of the summer that is not fun. I like to spray, then do something else more fun.The sprayer is relatively easy to set up (probably 5 minutes) and comes with seals, nozzles of varying patterns for customized cone of spray, and a heavy-duty pump and handle. Here are pro's and con's:+ Well-built; better than the cheaper designs.+ Love the extra 1 gallon upgrade to 5 gallons over the 4 gallon - for longer trips out to spray, believe me, the extra gallon space is worth it!+ Can cover a lot of ground! (example: I can usually cover up to an acre or so; spot spraying around a thousand trees at full capacity).+ Reduces wasting time constantly filling up (as with small sprayers).+ Fits very well for an average person; snugs right to your back.+ Feels like a full backpack when walking.+ Easy set-up.+ Graduated symbols on the tank shows how many gallons are left.+ Has a continuous spray option if you are interested in band spraying.+ Adjustable stream for spray.- At 5+ gallons full/weight, I use a small bench to set it on and strap myself into the sprayer and then lift it off of the bench. A smaller person might have some difficulty strapping themselves in without help or the right set-up to lift the tank (ie. set it where you would like to strap into it, fill it, strap in to it so you can walk away with it strapped on rather than have to lift it to stand, etc).- Can be heavy at first; spray the easiest areas first saving the harder to reach terrain for when you have a gallon or two left.- Standard harness/strap is ok and is a little weak looking (did not use it), but I would recommend an upgrade to the better harness for heavy carry spraying for extra support and padding.- Can be a bit large if transporting (but it is streamlined for its size - 5 gallons is quite a bit), but for the most part it will sit in the seat of a car for example - the pump sprayer attached vertically.I have not mixed powder forms to the sprayer. It can take a wide range of contents.Summary: The sprayer is well worth it. Absolutely recommend it. The upgrade harness I recommend as well. Cost is pretty reasonable on Amazon (where I purchased it). With it you have the flexibility to go from 1 gallon to 5 gallons and then some depending on your needs. Happy spraying.