This sure beats opening the GIMP all the time just to compress a JPG, and teaching our content writers how to use the command line to compress images with a CLI utility. Always did like TinyPNG, so I'm glad to see this too.
I use IrfanView on Windows most of the time. It's small so it starts up pretty fast and changing quality is a few short clicks away (most of the time the options on the save dialog are enough). I don't even have to upload it to somebody I don't know, it works offline too and I even managed to teach it to my mother (she uses the batch tool now). So it can't be that hard.
