I use trim weights as well, usually 1 to 4 lbs in each pocket depending on the wetsuit I am wearing. I dive a Ranger which did not originally come with the pockets but Zeagle sells add on pockets that will fit almost any BC which has 2 tank bands. See http://www.zeagle.com/bc2001_options.htm
I find they do a good job of allowing me to move weight around so I can trim myself as I want for the particular dive.
As to the weights being a hazzard, I don't buy it. Do you REALLY want to dump all your weights at once? A Polaris missle comes to mind. Besides, these are TRIM weights, a small portion of the total weight you using so not being able to dump them is not a major concern.
I find they do a good job of allowing me to move weight around so I can trim myself as I want for the particular dive.
As to the weights being a hazzard, I don't buy it. Do you REALLY want to dump all your weights at once? A Polaris missle comes to mind. Besides, these are TRIM weights, a small portion of the total weight you using so not being able to dump them is not a major concern.