Is it worth buying both plug ins or does the Magic Bullet suite provide sufficient time warping capabilities? I had initially thought of buying Magic Bullet Looks for the colour grading and then Twixtor for motion effects. Any thoughts gratefully received!

Magic Bullet is all about creating a look with color correction/filters. Twixtor specializes only in re-timing, not color.

I've never used MB however Twixtor is by far the best, easiest to use retiming tool I've ever seen for any NLE plug-in.

Thanks Robert, do you know if Twixtor Express is worth getting over Twixtor Pro if you don't need all the full features or do you compromise alot of quality in slowmo playback?

Unless you need some very high-end motion tracking to go along with the retiming there's no need for the pro version.