My NCT group have babies 2-4 months old at the moment so folks are starting to think about moving to their own rooms etc. One woman has mentioned she's gotten a movement monitor so it's "ok" to put baby in her own room now.
Now there's nothing wrong with putting baby in his/her own room whenever you're comfortable with the risks/benefits (we're currently weighing it up because the risk to my mental health because of not sleeping versus the tiny tiny risk of SIDS for DD is much greater so I'm really not judging!) but the movement monitors don't work! There is no evidence whatsoever to show that they are effective in reducing SIDS.
AIBU to say something to the group? One slightly panicky mum has already bought one and if it brings her peace of mind, great. I don't want to ruin that but equally I don't want everyone else to collectively spend £100s on something that isn't effective!