Instruction: Evaluate the answerability of a question by analyzing the related document, outputting yes if the document contains information addressing the question, and no otherwise.

Input:
Question: How much weight do they add and will does the goo spread evenly when the bike is in motion?  I have a 700/23 road bike.
Document: They've held up well, but there's no way to know if it really works to seal small holes - I've never found any little green spots on the old tubes. The one time I did get a flat from a nail, there was so much slime on the tube that I couldn't patch it.Update June 2013:  I still had 2 slime tubes on my road bike (700 X 23 Presta) - and again, the valve stem broke off on one of them, at least it lasted a couple years. Also - very difficult to get air into them after letting the bike sit for a long time.
These tubes are a great way to get some light weight protection against flats. I have been running them for almost two years in my mountain bike.Kept me from getting a flat and having to make a repair way back up in the hills miles from anywhere on more than one occasion. Won't protect you from every flat--if you want ultimate protection, go with thorn resistant tubes and tire protectors, but those tubes add way too much weight and the tire protectors reduce the quality of your ride. I've heard others comment that it's had to patch a slime tube because of the slime, but I have never had that problem.
When I removed the pump the threaded stem was bent. Moreover, at the beginning the valve leaked audibly and I had to pump several times before it started seating properly. Not a good start, I think.Will add to this when I have some experience riding on it.Well, this did not last long:  The first time I tried to put some more air into the tire I found the cap on the Presta valve stuck, probably from some green goo that had seeped out. I unscrewed the valve instead of the cap and green goo shot out of the valve stem (not terribly much--I had the valve at 2 o'clock).
So far so good. I have been riding on these for 2 months and no flats. I guess it's hard to know if I would have had a flat, but so far all is well. These add some weight to the wheels so if you are the kind of person who really cares about how much your wheels weigh then these are not for you. If on the other hand you commute to work and just do not want to have to deal with a flat on a rainy morning then these are pretty good.Two other comments.
I switched my inner tubes so I didn't have to worry to much about getting a flat. They will stop or slow down air loss if you get a small puncture. I have first hand knoweledge of this. One time I changed a tire because it was worn and when I took the old tire off the rim there was green on the inside where the tube had a small hole in it. I don't know how long I had been riding on it. I don't think they add much weight if you are concerned about that.
I've been dumb enough to try these 4 times and every time the result has been he same. With a normal flat tire you have to stop your ride and replace a tire. With a flat slime tire you have to stop you ride, replace a tire and clean sticky green ooze of your bike, your clothes and your hands. The tires I've used have been the 700 x 19-25 road tires. These require high pressure to prevent pinch flats but at 100+ psi the air pressure forces the slime out with an impressive velocity and there is no time for it to congeal and plug the opening.
I've used this tube for a few months now on my road bike, and I've had 1 flat that sealed immediatly and only needed more air, and 1 flat that I had to patch or replace the tube. I would guess this helps reduce flats a bit, but I'm not sure it's worth the extra money, and you still need to carry repair and reinflating kits, so it doesn't save you space or weight on the ride. A great idea, but it doesn't quite live up to its promise.
I tried these out 3 separate times. Twice I had flats that the slime could not seal (what's the point of them then?) and the other time the stem broke off. These are poor quality stems and just poor quality tubes in general. The slime is a mess too; it gets all over the inside of your tire, hands and pump. $3 tubes from a LBS are much more reliable and cheaper. These should be taken off the market (road bike model only).
I never want to have a flat out in the middle of nowhere. So far, so good! Although they add weight,  I use these and thorn gauards in my tires.
Like other reviewers, I bought this tube hoping to avoid the hassle of a flat on long rides of my road bike. I'm a "Clydesdale" kind of guy, so I use a pressure over 110 lb psi. After accidentally riding over some broken glass - shards so small that I didn't spot any holes on my tires (which are still going great 1000 miles later) - the tube flatted and did not seal the puncture properly. So much for the promise of slime tires sealing small pinhole punctures. The slime just sprayed out of the puncture on the tube like a squirt gun when I tried to re-inflate it - I followed the directions closely, too.So, thinking that the first tube was a "one-off", I tried to use the other slime tube that I bought at the same time (tend to buy bike tubes in pairs).
Answer: yes