No, it looks gash and you can probably get better for £50. I'm still using an MX518, I even bought another one as a spare  (dance)

Twelve is like the minimum:

1. Left
2. Middle
3. Right
4. Back
5. Forward
6. DPI
7. Alt-Tab
8. Play/Pause
9. Skip Track
10. Stop after Current Track
11. Vol Up
12. Vol Down

With a tilt wheel freeing up 4/5 it's possible to make otherwise awkward multi-key shortcuts a single press - particularly ones that would otherwise require taking a hand off the mouse then putting it back afterwards to complete, and that's without even getting into macros...