Jepp approach charts are so primitive. I can take my crayons and try and make sense from a few spot heights what the local terrain is like, but I would far rather, and it's far safer, to use an Aerad chart with atlas-type terrain contouring and colouring to see what you're descending through! Having used a Jepp approach chart on Chambery, all I can say is you don't know what you're missing because probably all you have ever known or used is that 30 year outdated chart style! But while criticism of the hallowed Jepps is taken as criticism of the good old red, white and blue, we're not going to get anywhere! They're awful.