Hi Michael. I find a great difference between shooting at 5 or 2 mp. Shooting at 5 gives a greater definition in smaller details: this way You can, for istance, crop the picture, taking out undesired parts, still having good printing possibilities. I use RAW format that gives easier and more effective possibilities in post-production: correcting color dominance, increase/decrease contrast, light. etc.
You cannot take pictures untill the camera has ended writing the card.
The AUTO setting on the YS-90 works quite well even it is pure legend that if you set the same aperture on both camera and strobe your picture will be perfectly exposed: you have to make any tries changing the aperture on the strobe antill you get the proper exposure.
Greetings from Italy
Marcello