Here’s a compilation of must-read review articles and user opinions / feedback on Instapaper Pro for the iPad.
Marco Arment, the developer, has an extensive writeup about the new features and what has changed in version 2.2.3 of Instapaper. Here’s Marco on the new brightness control:
This was an easy decision to include: the iPad is far too bright to comfortably read text with a white background in a dark room, even at its lowest brightness setting.
I wish I could do it the way iBooks does, with actual hardware backlight-level control, but that’s not available to app developers. So mine’s done by putting a giant translucent overlay on the main reading and list areas. It’s a hack, but it’s the best that app developers can do for now. (Amazon’s Kindle app does the same thing.)