Lol, two years ago, it was. Now, there's better gear available. That doesn't make a pro-tank bad. I have several myself, although I don't use coil tanks any more since I started rebuilding. The Protank is still the same tank it ever was.LOL I didn't realize the Protank was not popular, I got my first one almost two years ago and at that time I thought it was pretty awesome. I will be excited to try the nautilus, it's a bit more expensive but sounds like it's worth it.