+This jutsu would be used in battle to get up close and personal with the enemy, but without them knowing. It could be used to get away, also.
+I would counter this jutsu by focusing on my opponent and not dropping that focus from the gitgo. But, if worse came to worse, is activate my Sharingan. (Wouldn't help too much if hidden mist was activated.) If I had some, I'd use some earth jutsu to make the ground different, so approaching me would be quite difficult.
+Advantages- This jutsu can get you close to, or away from your opponent, silently. It sounds as if it's best used in conjunction with some simple espionage tactics, with some vital cuts with a Kunai or sword. With Hidden Mist Jutsu, this jutsu becomes much more difficult to counter.
+Didadvantages- This jutsu can be used to get away, but any attacks used from a distance can be heard, such as a Kunai or shuriken coming at you. As Kakashi and Zabuza demonstrated, in a situation that silent killing and hidden mist jutsu comes into play, it is best to have a few clones out, because if not, when they get behind you, it's pretty much GG.
+My opinion of this technique is that it is pretty useful, but more useful to get some distance between the enemy and yourself, unless Hidden Mist Jutsu is incorporated into the mix. Then, this jutsu is excellent, and that is when you can become a true old school come out of nowhere and slash down your opponent ninja. All in all, it's an awesome tech.
+This jutsu is used to, as the technique suggests, slow the target down. It will cause some damage while also catching the opponent off guard and causes a bit of a higher success rate to a following attack.
+To counter this technique, I would use a wind jutsu to blow away the smoke from the smoke bomb so that there could be no confusion in what is happening. Depending in the wind jutsu, I could also pick up the spikes and send them away as well, if they are there of course.
+advantages- This jutsu can slow the opponent down, as well as harm them and leave them more vulnerable to your next attack.
+Disadvantages- This jutsu is almost too simple to work out as planned. A smoke bomb must be deployed to make the spikes less noticeable, and that alone could send the message to the enemy to not step there.
+My opinion of this technique is that it isn't very useful, but if the situation was correct, I believe it COULD work out with a decent outcome.