We never used one - Thomas was a wriggler and my mum bought the lindam one for him at her house but he thought it was a game and tried climbing up it and over it which i thought was more dangerous than actually falling out of bed
we just put a doubled over double duvet and a couple of throws on the floor in front of his bed for a while whilst he got used to being in it. I think he only actually fell out a couple of times and then realised.
Does tyler have a cotbed or will he go into a proper single? Cotbeds are pretty low down anyway so not far to fall onto a padded floor. If he's going into a single which is a bit higher could you use his cot mattress on the floor next to his bed for a while just incase? with a thick blanket rolled into a tube placed under a fitted sheet at the edge of his bed to make it difficult to just roll out? (iykwim?)
Sorry not much help hun - we only used the guard once and found it a pain in the bum
xx
Sorry not much help