Very much so!
It is on all the time. Perfect for my needs. Pretty sure 24-70 is better and who would not want a 2.8 or primes. But for the versatility and affordability, nothing beats this lens.
Bodies: Canon 6D, 70D, T2i gripped, EOS 5, EOS 100, EOS M
Lenses:EF 24-105 F4L, EF 70-200 F2.8L mkII, EF 100 F2.8L, EF 50 F1.8, EF-S 18-55mm, EF 28-80 USM, EF-M 22, Rokinon 8mm HD Fisheye, M mount adapter
Other : 540EZ, 320EX, 430EX II, Yongnuo triggers & strobist stuff