i have her facing fwd in the HAB at least once a day for our walks with the puppies etc... and the baby bjorn is just for quik in and outs at the shops.. i know its not great on bubs spine so thats why i have always limited it for quik things... in the pix of the ergo when they're on ur back facing fwd it doesnt seem like bubs can see over ur shoulder?? ive tried the hip thingy do da with my baba sling Fi... (yes i am a carrier nut, though only bought the HAB.. others were hand me downs)... maybe i'll just keep experimenting with the HAB... Altho a 4th carrier cant be wrong can it...hehehehehehe