Hi mate I have been wearing my Crewsaver jacket for a few years and seems to be pretty comfortable and well made. I do try to make a habit of wearing it for safety sake and setting a good example for my kids.

 Hi CP

Have used several makes over the years and each feels a little different, but all have had adjustable straps and can be made to fit pretty well. Ones I've like best in the past include a jacket made by Burke, but  last year  I changed to the Hutchwilco Supercomfort series. maybe a slightly better feel for me, but it happened to come on sale when I needed replacements and was a reputable brand.

Each make has some minor variaitons that can affect fit and ease of use. For example the harness straps differer in width and thickness betwwen some brands, and how the harness straps joit the main part of the jacket  might be simply direclty stitched on or attached to a sort of short, fitted fabric tongue that can allow a more ergonic shape to the harness. Other things that vary include the buckles. My old Brke had quick release plastic buckles, which made it very easy on and off, whereas the Hutchwilco uses to stainless buckles that interlock. Probabaly more durable but slightly more fiddly to put on and off.  Nealry all the adult PFD will have a lift rating of 150NM, although the one I now use has a little more at 170NM. 

I think it is just a matter of trying a few brands to see how they feel. 

Recfish West sell Crewsaver ones which I have. I also have a hutchwilco in the boat. Whenever I am alone or with one of the kids (6 and 3) i wear one. 

I dont see the value in taking the cheap option on life jackets. 

Thanks for the replies, that has helped me 

I've also been looking for spare indicator clips - the green clips that go on the trigger thing  

They're inclined to break when you do the check/service of the jacket 

No one seems to sell them seperatly   

I use a crewsaver Ergofit 190CS with double crouch straps. Very comfortable to wear and the crouch straps are not an issue, it also has PLB pocket.