Has anyone used the Bambino Merino sleeping bags?

My son is 5.5 months old. It is starting to get cold and I don't want to put blankets in his crib because of SIDS. (He is not yet coordinated enough to get them off of himself if he gets tangled). I put him in a footie sleeper, but it is starting to get cold and I am worrying that he might get too cold at night. I saw these Bambino Merino wool sleeping bags on the internet. Has anyone used them, and if so, how were they? Does baby get tangled up in them too? Was baby comfy? Too hot? Anyone who knows please respond….

I used something similar and my babe was all cozy in "Halo Sleepsacks" – Found at Babies R Us.
I probably wouldnt put my babe in something wool….sounds itchy and possibly allergenic.
The halo sleepsacks are very warm and cozy and approved by the SIDS foundation and the Back To Sleep campaign.
Run about $15-20