Willsuds-
I bought one of the safety jackets earlier in the year from a local dealer in Sussex. I bought the lighter of the two safety jackets and also a back protector, together with three outer jackets. The fully waterproof one obviously, but I also got the Breeze Jacket which is ideal for UK sunny days. As I was then preparing for a 2,500 blast around Europe I also treated myself to the Full Mesh Jacket, and back in June when we went the weather was cracking with Highs of 38 recorded on the on board temp gauge. I found that the mesh was perfect allowing enough cool air through, in fact I think I was the coomfiest of our bunch of 13 riders.
The jacket has sort of 'moulded' to me now and offers a very an excellent level of protection and is comfy and smart. Good quality and attention to detail also I have nothing but praise for it and have now sold off some of my other jackets (a couple more to go) as this fulfils all my needs. I won't be using a leather jacket again with this level of protection.
The downsides are that it is about the same weight as a quality leather jacket, and that I still took the waterproof cover with me to Europe in case we suffered bad weather, so this took up some luggage space. For me it was OK and worked out well. Not cheap but good quality stuff is rarely so. Hope this helps.
JH