In reply to jazzyjackson: Not sure how putting a gilet over a PS top takes longer than putting on a hybrid jacket? Think about it, in actual UK conditions and usage. If it's cold, you'll have a PS or similar top on already whislt you are moving. When you stop or really slow down you put on either a shell or an insulating layer.
As for the weight, not really a factor depending on your system. With the hybrid you'll need a decent baselayer underneath for when you take it off (ie when active and too warm). The PS could be the baselayer so you just take the gilet off, removing the need for a baselayer and that weight.
I just think that these are too specialised, for too few conditions and activities that are actually encountered. Each to their own though.
I think you (well, not you specifically, but anyone generally who is interested) need to stop think about hybrid midlayers as a replacement for two things, it's just a different way of doing one thing with various advantages and compromises. i.e. if I was out with just a PS jumper as midlayer I'd probably take windproof as well. But with the Alfar I don't need to, but on the downside you can get hot under the synth insulated bits if its not cool to cold. Swings and roundabouts really. Will suit some people and their needs, and totally fail for others.
I think my review of the Alfar should be out quite soon as well, where I go into these things in a bit more depth!