I got my PD7X last week. Very impressed by its perfomance and the way it's built. It only takes 1 minutes and 56 seconds to copy 500 MB data from my 512MB CF card to PD7X. This is exactly the feature I have been looking for since day one.
Battery life is great. Having downloaded 26 GB data from CF card to PD7X with a set of Sanyo 2300 mAh NiMH batteires now, the device is still going. I won't be asking for better battery perfomance than this.
My PD7X comes with Fujitsu 40 GB 5400 RPM 8MB Cache HDD. I was told that this HDD has the best perfomance and reliability with CompactDrive. I noticed that this HDD is unbelievable quiet. Over all, I am very satisfied with this product. I purchased mine from www.compactdrive.us , very nice company to deal with