Don't know about that one but we just got a Trek 'tag along bike for my 4 year old and he loved his first ride on Sunday.
At first it does feel strange to me (the rider) but after a couple of miles it's really good.
It cost £98.00 with LBS discount and it's money well spent!
The Follow Me Tandem device is available from Velorution, a great bike shop in Great Titchfield St in London. seewww.velorution.biz
It looked pretty effective but is a bit pricey (about £140 I think) and adds weight to the adult bike when not in use unless you remove it which takes a ew minutes. I didn't buy one becasue it wouldn't fit my bike which has a Sram hub gear.
I'm still undecided as to what to buy instead. The Burley Piccolo looks good but costs £300+!!
It looks like a deathtrap.
What if you're taking a bend quite fast downhill? The child on the back could easily jacknife.
what if the child on the rear bike tries to steer? It could upset the balance of the whole thing tipping it over, sending everyone on the front bike flying into a river.
What if the child on the back detaches themself and inadvertently rides the wrong way or crashes and you ride for miles before noticing they're not there?
I wouldn't touch it with a bargepole. If you want your kids to cycle, there's only one method. Get them a bike, get them learnt how to ride it, and get them riding along in front of you. No fancy metal attachments will replace that. This thing is obviously the brainchild of some bored person who can't think what to do with himself since being made redundant.
But presumably you'll decide that it's ok becaue it's been theoretically proven to be in some lab