First serious day of actual use, quite a few issues.
Large screen size is great, but a little slippery to hold. 2 handed grip is more comfortable, but typing on landscape keyboard is a stretch for thumbs.
A simple operation of copying text from a PDF to an Excel file turned out to be a stern test for the device.
Thinkfree Office, which came free with the Galaxy Tab, didn't support text selection in it's PDF reader.
Downloaded Adobe Reader from Android Market, but that also didn't allow copying of text inside a PDF. Eventually resolved it by downloading the paid version of Documents To Go.
But the device hung and I had to restart it. Not a great start.