Got a 2GB for my wife and a 4GB for my 14 year old so he'd have the video capability. I bought both from Woot, and both were refurb (rox0rz!) units. I tried putting rockbox on the 2gb and had problems (it was a Rhapsody branded unit, and I didn't want the Rhapsody stuff on there). that did not go well. I called the Sandisk helpline, and they were VERY helpful, even while acknowledging that by trying to put Rockbox on, I had pretty much voided any warranty. They still helped me get back to the default software state. So my experience with their helpline was solid.
this unit recharges through the USB connection -- there is a wall outlet recharger, but it's a separate purchase, not in the box. The charge seems to hold for quite a while.
the FM tuner is GREAT.
As for the media converter, that is an incredibly cumbersome step, but it does work. What happens is that the program usually doesn't recognize the player, so it says that it can't finish the process. But that really just means that it can't load it onto the player that it doesn't recognize. the converted media is sitting in a folder on the hard-drive and can be loaded yourself by simply putting the converted file into the video folder on the player. Once there, the video plays nicely. I really don't know what's up with having to use the converter -- it seems to put them in an avi format, but it's larger than the original avi file before conversion, so who knows what it's adding to the file. but once it's converted, it does work, even if the software says the process failed.
Bad user interface, bad software, but still a great little player.