hf10 and what SD cards?
 

Anyone have any issues with any?

I am using kingston 8GB class 6 works great, but want a 16GB card, and they only make that in a class 4 so I am currently looking at transend 16gb class 6 and delkin 16gb class 6

Anyone use them? or what do you use and how does it work? and do you shoot the highest settings?

I have a Kingston 16GB Class 4 that I've used in an HF100 with no trouble at all and yes that was filling the card at the highest bit rate. As long as it's a Class 4 or Class 6 card, no problem. Avoid a Class 2 card as it won't be fast enough for AVCHD.

Great! thanks for the info, its great to hear.