As some other reviews say it’s capacity is smaller than it appears, it is barely half the depth of the entire machine but sense I was expecting that and still feel it is a good value all I would recommend is go ahead and get one a bit bigger than you think you will need. You can partly fill the tank with water and put small parts in a ziplock with a cleaning solution so you don’t have to use a bunch of cleaner for small parts so there is no real downside to a larger machine besides the space it will take up but if you plan on doing anything larger you will probably be glad you did. The heater seems to work well, I filled it with hot water from the tap and turned on both the heater and the cleaner and it warmed up the already hot water. I have only experimented with simple green and another degreaser I have as cleaners and they both stripped all the gunk off very well. What surprised me most is I put a whole trigger housing in without dissembling it, I know that this company uses plenty of grease inside so I was curious how much it would get off but to my surprise there were globs of grease in the tub after it was drained. Keep that in mind when cleaning parts that have friction because it will strip the grease as well as oil from inside and need to be re lubed bit that is the whole point. All in all pretty surprised with how quickly it removes heavy build up from right nicks and crannies that are very difficult to get to any other way.