After using it for a while (some 3,000+ shots later) I have a few suggestions for features that would make life and the product even better.
1) Custom white balance selection via dropper tool. This is in EOS remote so I'm guessing it'd be easy to incorporate. I know I can apply a white balance to RAW files in DPP however being able to compose lighting etc with more accurate colours is very important to me.
2) Lock mirror option. This is not in EOS remote so I don't know how difficult it is. Live view from my understanding creates heat build up in the sensor thus increasing sensor noise and subsequently image degradation. You can disable live view whilst shooting but there is no 'lock mirror' option. I believe it is definitely required for studio type greater than 1:1 macro work.
3) A larger focus increment advancment button. If you are using small increments you have to sit there at the computer and wait for each increment selected to finish before clicking again as keystrokes are not queued, which is quite tedious since there is no click or key stroke queuing. I've reduced all delays to the bare minimum and it is still not great. I would greatly appreciate the ability to select 100 focal increment steps for where you know from experience you will need to do so. I'd be happy to have the additional button on either end of the scale only enabled when small increments is selected. I tried selecting my start point with normal increments and then advancing to about where I wanted to set a stop point then tried to switch to small increments for fine tuning but it cleared my start point and vice versa.
Generally I'm using a Canon 50D with EF100mm f2.8 macro with optional diopters and extension tubes.
