I love Spyderco for the fact that they are willing to take risks on experimenting and are always doing inventive stuff.
For how much weird things they've done I guess it's strange to see so little things really flopped.
I agree that the T-Mag was a real shame, it looked so perfect and then when I held it turned to hardly have a lock, or a detent..
(shapewise it was really good though)
The Vagabond is a great user I believe especially for slightly less fanatical knife people to just toss in the bag and have around, shame it didn't do well commercially but a really cool design non the less.
(am a proud owner but never use it, always already something else to use in the pocket or a bigger fixed blade in the bag)