Overall it's worked out really well so far, monitoring trigger bounces and digital outputs on my pic projects (up to 2Mhz signals).

Basic Details:
Dual Channel Color LCD Display
150MHz Bandwidth
Trigger Modes: Pulse Width, TV-Line, Event Delay and Time Delay
Math functions
Built-in Interfaces: USB, RS232, Printer Port

Problems:
Cooling Fan: When I first got the unit, the cooling fan made an unbearable grinding noise (any noise is unbearable when you paid over $1,000 for it) -- However I emailed Instek support and they promptly sent me a replacement fan! It's good to see companies so responsive to their customers. Since then I haven't had a problem except for the USB capture

USB Capture (6/2006): So far I haven't been able to use the "FreeView" software supplied, to capture images from the oscilloscope. I've installed the serial->USB driver, and the GDS-820C driver but the FreeView software does not detect the scope. I'll have to try reinstalling the drivers.

UPDATE: 7/3/2006 I got USB working with the oscilloscope. I'm not sure what changed however I did end up doing a full turn-off/turn-on of my system. Also I loaded freeview when the oscilloscope was turned off. Then I turned on the oscilloscope. After the oscilloscope was on, and I heard the device driver had been loaded by windows I clicked on the "connect to oscilloscope" button in Freeview. Magically it worked, and has been working since.

Virtues:
Quick Response from Instek: they responded to my email about the cooling fan really quickly and sent out a replacement fan immediately. They also promptly emailed me back about the USB problem, however it started working right after I emailed them, so I didn't really need help anymore.

Overall: Useful! I've been able to easily monitor any signal I've needed to so far. The interface is what you'd expect -- pretty easy to use, buttons and dials that mostly do what you expect.