I must admit I've not been impressed when I played with my VMG (older of course). In fact, I was pretty unimpressed with most of it, apart from as a bridged modem. I've found it rock solid, logging access is great, and I even managed to get the VOIP ports working in bridge mode. Spend £10 on a VMG and your 2860+8924 is a great combination, and isolates your problem to your WAPs.
I'm biased of course - 2 box solutions are just the way to go I think.