The effect with these is great, but there are problems. One, these are some funky looking
rubberbands that people have never seen before. They might not think that they're legit, but after
you let them examine them, then you won't have any problems. Just get your spectators to believe
that they aren't gimmicked or anything.
Two, these are weak. You have to be very careful with
this or they will break on you fairly easily.
Three, I don't think that they give you enough
single rubberbands since those are the ones that will break most often.
Lastly, the linked
rubberbands are poorly made. You can see the point where they attach.
They're good, but you need
the presentation skills to justify them and work around it. Even though the bands are bad, I use
this effect everyday and it kills. Go with the new SLR slims.