I'm with Ian. I'm a real fan of those sticky rope things. They work great. I rode back from Anchorage on a tire plugged with one. It started to leak about 50 miles from home (~4k miles later). Shoved another one in and finished the ride.
The sticky ropes have never failed to get me home. The stop n go plugs don't work so well in steel belted radials. Picked up a drywall screw in a rear Tourance, and plugged it quickly with my brand new stop n go. 50 miles down the road the tire went flat again, the soft rubber plug chewed in two by the steel wires. Re-plugged, and that one lasted 49 miles. Finally tried the sticky rope, and it was still holding fine 1,800 miles later when the tire was replaced.
This is great data. I have a stop n go, but have never had to use it (knock wood), but I always worried if it would "do the deal". Going to grab some sticky rope and tools for summer riding!
+1 for the rope style ones we recently fixed a 12mm(1/2") cut in a tyre with 3 ropes, we put 2 in and held them in position with 2 leatherman pliers then pushed 1 in between the first two.
It got the rider a further 700KM before it failed, fortunatly it was close to a tyre repair shop and they fitted an internal patch to get my mate home.
I've a home made kit that includes 3 different kinds of plugs (rope, bullet, and BMW style), goop, plug tools, CO2 cartridges, AND a pump. Different plugs work well on different size holes. It annoyed me no end the time I had to make a little hole much bigger to fit the BMW style without tearing the plug.
If you use something that requires goop be sure to check it on a regular basis. I once was lucky enough to find that 1/2 of the three tubes I had on the bike hadn't hardened. Two of the three had never even been opened.
Had one for the mini cooper...worked great for nails