I have always loved our iron pool fence. I feel so much more secure. Not having ANY experience with the mesh fence, I can't really give you any pros or cons on it. I just wanted to let you know that having a pool is a huge responsibility on your part. You have to be so diligent-AT ALL TIMES!
We kept a padlock on the gates to our pool at all times!!! My husband had the key on a special key ring, high in the kitchen cupboard. We installed an alarm system in our last house that chimed everytime a door was opened. We had the chimes set to tell us what door was opening. We knew that if we heard that chime, we should run to see who was going out. It got kind of annoying at times, like at gatherings, but it was still helpful to know if someone went outside. We loved it and never regretted paying the monthly fee for it. We felt so much safer! Just a suggestion. You might also consider installing a higher lock on your doors that children can't reach. We installed a temporary one that I unscrewed everytime we went out to play. Just some extra precautions because a pool fence does not offer instant security.
I know that I found my two little climbers on more than one occasion on top of the pool fence and I am not sure what I would have done had they gotten into the pool. Fortunately, I had them in rigorous swim lessons as well, so they know how to swim too, but you can never be too careful.