I am a fan of tubing mascaras because every mascara, even waterproof, WILL smudge on me (unless I use a combination of a primer such as Origins or Clinique under or Clarins Mascara Fix --great product which I have also reviewed-- over, which adds a lot of extra cost and an extra step). If you don't have that problem, I'm sure you could find a mascara that delivers similar results that is cheaper.
That being said, I think this is my favorite tubing mascara out of Clinique High impact Curling (my last favorite -- which flaked a little and was more volumizing than lengthening IMO), Two Faced Lash Injection pinpoint (not enough impact) Lash Injection (flaked a LOT) and Blinc Kiss Me (also not enough impact, but the easiest to remove).
As has been noted, this does not come off in tubes, but if you thoroughly WET with warm water and splash (I kind of hold my lashes gently so the water soaks them) it does comes off without a separate remover, although it is more in pieces.
I got a small sample tube at Ulta which was not at all dry, so if it dries out quickly that would affect my decision to repurchase.
The reasons I liked this one the best was because you could build it some -- do one eye, do the other, and come back and add another coat to the first eye -- which you CANNOT do with most tubing mascaras. Also, as someone else noted -- this works better if you just comb it through without wiggling the brush (wiggling made it clump on me). This allows for IMO a nicely lengthened, slightly thickened, nicely defined lash with no clumping.
I generally prefer a lengthening mascara to a volumizing one, as my lashes are short. It is definitely enough for me for everyday, and even for evening with a heavier liner. It also does not flake and most importantly for me does not smudge, even on bottom lashes. I can't testify that it is waterproof since I haven't tried that yet.
I am not thrilled that for $20 it is more than the Clinique, but I like the lengthened and defined look it gives me better. It also holds my curl (although the Clinique does that too) and it leaves my lashes soft. What more could you ask? : )