I mostly use these small machines for automotive interior cleaning, and the occasional spot cleaning an area rug.For years I have used a Bissel little green machine I purchased in the 90's (still working too). But I loaned that out and have not been able to clean my automobile carpet for a while now.So in comes the new Hoover,The Hoover seems to have more suction power than the Bissel. Which may be a good thing for the Hoover as it just dumps the solution out in a heavy spray. The Bissel gave a finer, light spray which I prefer as it did not soak the area. So, suction good, solution spray bad.The Hoover solution tank has to be turned on its face and filled through the back. The measurement marks are for when the tank is in its upright position. So you fill it, lift and look, tilt and fill, lift and look. I guesstimate that when filling to the top line, while at the kitchen tap filling with warm water, leave it about 1/2" from the back sides surface will get you to the top "Large Mess (0.4 Gallon)" line.Once attached to the machine, a trigger pull gets the solution in no time.The Bissel has a bottle (remember this is a 90's machine and not like what they sell today) That gets disconnected from a hose. Fill it and pull the hose up from its well, attach to bottle, turn over and drop the bottle in. If the machine ran dry of solution, it was a bit of work to get it flowing again.The trigger for the solution on the Hoover is a bit large and easy to hit, even when you don't want to.Fill and measure for the Hoover loses. getting solution to flow wins.The country has gone to the dogs, so everything is about pets. The pet cleaning solution I threw away and purchased Hoover's Deep Clean and Restore. This seems to work as well as the Bissel solution I would use.Always use a cleaning machine solution as products like Purple Power for instance will foam a lot and make a mess in the recovery tank.The Pleasure Nub on the tool head is worthless. I don't have pets and I don't shed. I had to take a toothbrush to spots to loosen the stains. After the very first use, I went to Hoover and found a bristle attachment (see uploaded image). Now I can give the person their toothbrush back.Would have been very nice if Hoover packaged both the nub and brush in with the machine (or preferably just the brush attachment). But it makes sense to package only the nubs and solution that are more useless to many so they will have to purchase what is of better use. The world was not gaga over dogs when I purchased my Bissel so it came with the right stuff to start with.The Hoover solution tank is nicer than the old Bissel. They are both easy to remove, but the Bissel was open and could easily spill if you let it get too full.Hoover for the win.Even though carpets look clean and you vacuum them often enough. Walking through parking lots and other places picks up filth on your shoes. The uploaded image of a recovery tank shows what came out of clean looking automotive carpet.Cleaning the hose is great! I always clean my machines after use. The Bissel I would run the water hose and tough the vacuum head to the stream. Had to do this lightly so not to put a strain from the heavy flow onto the machine.Hoover, add some plain water to the tank, remove cleaning head, hold in back of machine and turn it on. Once the solution tank is empty, with the machine still running, I hold the hose up high and shake allowing as much moisture to get drawn into the recovery tank from the hose as possible.Now that I have my brush attachment which I had to purchase separately. All that is left that I don't like is the heavy solution spray.But I am still glad I made the purchase.