So far, so good for me. I have had one force close, but no more. Occasionally, it will mess up the app title alignment in the app drawer and I have had one time where it refused to draw the Widgets and icons on the home screens. Going to the HL2 configuration screen and clicking Restart Launcher fixes it, though. Nothing has been bad enough to make it unusable. It has been working just fine with all of the live wallpapers I've tried, too.
For those who installed it from the website before, even though the version number is the same on the Marketplace variant (0.7), they are different. For example, the website d/l variant had the app drawer icon on the right and did not have the "Notification" button in the home menu. The Marketplace variant has the app drawer in the middle and the notification menu button is back.
Make sure to remove each widget from your old launcher before putting them on to the new one. Some Widgets get grumpy when you have them placed on homescreens of more than one launcher at the same time. That can sometimes cause f/c's, it seems.
-SR-