I use Photoshop, mostly because I use it for work outside of comics. My files are also pretty big and Clip not only saves PNG's much larger than Photoshop, (and for as much as Adobe sucks, they are the best at compressing file size) and Clip crashes too much when I use it, probably because I'm queen of adding too many layers and huge ass brushes. I do have Clip and I use it for some things, I just don't like the feel of it, despite using it for years and years. So, everyone's different. Especially if your files are smaller, Clip can work really good for you although it's been a pain in the ass for me.