I got this pic from fellow babywearer.
Test conducted to evaluate the condition / level of comfort of the wearee in a crotch carrier and in a soft structure carrier (SSC).
He was practically hanging on his father for assurance from falling off.
And see how he seemed relax and confident in the SSC..
Carriers like the Bjorn, Snuggli and Infantino SSC have earned the
un-savory nickname “crotch-danglers” because they don’t position baby in
the natural holding position. Instead, baby is seated in a fairly
narrow seat leaving the legs to dangle straight down.
I’d also argue that the “crotch-dangle” position is simple not
comfortable for baby (and somewhat different in a carrier where baby
can’t rest his feet vs. an exersaucer or jumperoo where his feet touch
the floor). Try this simple test taken from Didymos’
instruction booklet: Stand on one leg with your other leg out in front
of you, bent at the knee. Place your hands under your knee to support
your leg and let the full weight of your leg rest into your hands. Now
move your hands back towards your bum. You will instantly begin to feel
a strain in your back that wasn’t there when your leg was supported
under the knee. That’s the same strain a baby will feel when his legs
aren’t supported to the knee. Even if we assume that this position
doesn’t cause harm, it certainly isn’t as comfortable as the
source : http://www.becomingmamas.com/why-you-should-avoid-crotch-dangler-baby-carriers/
So my dear friends, please please please avoid from buying any crotch carrier.
Please read this article explaining how bad the effect is on baby's spinal development.