I use it and buy it by the 2.5gal containers. It's good and strong. I put it on engines and wheel wells 100% strength and hose off VERY well. I am pleased with the results.
It is available at our local flea market for 3.25 .... I use it to clean the engine bay. Also I use it in the washing machine as a booster to clean my rags. CAREFUL IT WILL REMOVE THE HECK OUT OF YOUR WAX OR SEALANT IF NOT DILUTED. It is a degreaser and must be diluted for other jobs...
I use it strictly for the work truck wheel wells that see LOTS of mud. I'll scrub them every now and then..lol
The personal truck I only use it 100% on the engine, and front wheel wells that are plastic. Once I'm done I dress them with armorall or something close to that nature.