QUOTE
But do I dare try Lion over aDSL line?
I assume you are talking about the downloading. It depends on how far you are from the switch, I guess. The download is a little under 4GB and I'm sure any tool may indicate several hours for an estimate to complete. Of course, the initial estimates are usually wildly over the actual times, but I would assume it would not be what you're usually accustomed to for most apps/documents.
The most important thing, if you do buy/download, is to
NOT run the installer until you've saved/copied/duplicated it to another place on your drive or even onto a thumb drive. When you finally run the installer, it will erase itself! If you didn't make a copy, you'll have to do another whole download!!!