I believe Aldens are listed as orthopedic shoes, which probably simply means (a) they provide some ankle support, and (b) they don't have a shaped insert or anything in the shoe. So, if you're wearing podiatric inserts (for bad ankles, knees, etc.), you can put 'em in the shoe with no real problems.
Michaelson's right. Weight wise they take some getting used to. This is true for driving as well as walking (see other threads about driving in Aldens). They're a good tough boot, though.
Weather-wise, I haven't worn mine long enough in the rain to get them to leak, but it wouldn't surprise me if they did. I've worn mine in the snow, and if the snow ISN'T packed down already, they're fine, provided you take a nice heel lead as you walk.
The soles, however, are completely smooth. They have ZERO traction, so if you're walking downtown by some fancy office after it rains, you'll want to be extra careful on the marble and granite sidewalks. Basically any smooth, wet surface + Aldens = bad news.
They're great the rest of the time, though. Just make sure you get the brown ones and not the orange ones.
![Wink ;)](./images/smilies/Indy%20-%20Wink.gif)