We have both. We hired the capsule and are lucky in that it fit into our pram so we didnt have to wake him when we went out. However he is a long baby and we have just put him into the reversible carseat we bought, and he is a bit more upright now so he seems to look more comfortable.
I did like the capsule though because it was easy to transfer him to pram or shopping trolley etc without having to disturb him but it is only for a short time if you have big heffalump babies like I do.