Colorimetry vs quenching (rates)

Can you guys think of any pros/cons of colorimetry and quenching for follow the rate of a reaction (quenching is effectively multiple titrations where you pipette out some of the reacting mixture at set intervals and stop the reaction).

Because I am stumped!

It depends quite a bit on what specific equipment you're using, but the starting point would be to think through exactly what you have to do for each method - some ideas:
-Colourimetry is easier to do since you just need to press a button every so often.
-Titrations are generally more reliable than colourimetry (at least in my experience!), because you know exactly what's going on, whereas the colourimetry machines can sometimes go a bit funny, and there's no easier way of spotting that.
-See what kind of precision and accuracy both methods give you.

There isn't really a huge amount to say - if you're actually getting data from them, see which gives you better results and then pick holes in the other method (and try to spot problems as you go along).