I think I mentioned to you that we used one but it was when DS was first in the crib, maybe from 3-6 months and the purpose was to keep the cats from jumping on him when he was sleeping as they were always trying to sneak in there to curl up for a nap! We ended up getting rid of it after a while because it became a non-issue. Have you priced them? We could only find them one place in the city and they were close to $100 CDN. I always thought DS would be one to try to escape his crib but nothing yet! I think they are definitely safe, ours attached with tiny velcro loops that went around the top of the rails of the crib and it was white mesh, very light. You could buy it, checking out the return policy, give it a trial run and return it if if doesn't work out....