I got a manual tommee tippee closer to natural one and although I haven't used it to B/F yet I have put it together and put it on the boob and had a few squeezes to test it out and it seems very comfortable. Plus I accidentally pumped a big stream of colostrum out of my boob on the 1st squeeze, so I am guessing it is quite effective! I am only using to express if I am too full or also to let DH have a feed every now and then.

The tommee tippee ones got a really good write up and the bottles are great too tbecuase they have the flexible teet which is meant to mimic mummy's nipples a bit more so there is no nipple confusion. talking to the lady at baby bunting, the pump's are meant to be almost as effective as an electric if they are used properly