PRO's:
1. It's nearly free
2. Easy to use if you have big hands and/or arthritis
3. Easy to count your turns because it's square instead of round. Count in quarter turns ie. 1,2,3-1. 1,2,3-2. 1,2,3-3 etc.
4. Provides better leverage because it's larger and has flat sides to grip.
5. Faster...