When reading a manual for a SafeSeat I noticed it said in there to only use Graco strollers with their seats as other strollers can damage the seat or something like that. I just wondered... how many people actual listen to this? Do you think it is important? I almost never used my Graco stroller and never thought anything of it...it seemed to fit on the other stroller fine (didn't have to force it to clip on or anything), maybe I should have read the manual back then.