Sure, I use clearos sometimes to this day. They are a tool like any other and have their place like any other. For me, they are nice and quick to set up, clean, etc... when I had a busy day and fine I need to rebuild an atty before refilling it. Sometimes, it's easier to screw in a coil to a Protank, fill it and vape than mess around with wrapping or wicking before refilling. It doesn't happen everyday, but every week or two I end up doing it in the evening, or on a busy Saturday afternoon between errands or work in the yard. They work just fine for me and are a great cheat. I also use Protank Mini II's in my Mircostick sometimes when I want a few pre-loaded attys to take out and about with me. 95% of the time I use my Spheroids since they don't leak. Ever.