I think there are pluses and minuses to the adjustable cam gears.
On the plus side its definitely quicker and easier and they can be reset for different cams down the line.
On the negative side they weigh more (probably not a big deal) and at least with the early versions there were some problems with them losing adjustment but I'm assuming that's been sorted out by now.
There are 2 adjustable sets I know about, the TFS ones and Cloyes also makes a set, I haven't used either so hopefully someone will chime in on which ones are better.
The TFS crank gears are simpler but the welding or pinning takes some extra effort.
I tried welding mine first but they are made out an alloy that doesn't weld so hot (at least with my so-so welding skills) and since the welds weren't great I pinned them also.
I used three 1/8" hardened pins, the gears do drill pretty well for the pins.
If you haven't done this timing before here's a pretty good video on the basic process:
How to degree the cams on the Ford 4.6L 2V SOHC. - YouTube
Here's an example using TFS crank gears (he uses the Cloyes gears also $$$)
TCCoA Forums
TFS really should supply some pins and instructions on how to use them with the gears.