I know this is an old thread but I presume the new bumper has got a hernia mesh. I have a mesh in me. I had two hernia operations, the first was stitched up with standard sutures and then that split open a few years later so I had keyhole surgery with the mesh. I have to say the mesh was better for me, than the sutures, I recovered much more quickly. When I had the sutures, I could feel for a long time afterwards where the suture scar was inside me. I knew when it opened up instinctively what had happened because I just felt the scar giving way.
With the mesh I had less post operative pain, a bit of stiffness and discomfort but it wasn't the same level by any means. One thing my surgeon had stressed to me with my mesh is it needed time to heal, ie it was good to start walking around etc after a week or so to get the muscles working and blood flowing down there but leave it a good few months before I did anything that would really put pressure on the region. I seem to remember him saying it was basically held in place with tacks while my body healed between the mesh openings and knitted it all together, and until it had knitted the tacks could pop open if you pressurised them.
A few years down the line I have to say its barely any problem for me at all. I can occasionally feel a twinge, not pain, but a twinge where the mesh is, but it feels a lot more secure than the sutures did. I guess I had no infection or anything and my body just accepted it and knitted it together in my abdominal wall so now its basically part of my body. Top marks to the NHS for that one...