I used a Knighthawk prior to switching to a BP/W.
One of the reasons I bought it was specifically for the integrated weight systems. Many divers, myself included, are constatly changing weighting because of different conditions and suits; changes from cold water to warm, wetsuits to dry, etc. I looked at other BCs that seemed to have far more complicated integrated weights, so every change of weighting would entail unthreading and rethreading or some other complex action.
The fact is, you remove your integrated weights everytime you remove the BC. Either before getting on the boat, right after getting on the boat, or once ashore from a shore dive. You don't want to hang up the BC with the weights in, heck, you don't want to be fooling around with getting the BC on or off the tank with the weights in.
You will have plenty of practice getting those weights out in a split second. Personally, I think they are easier than getting a weight belt off.
The Knighthawk is a terrific BC. Several of the staff at our dive shop have purchased them and they are a favorite of several divers I know.
Don't worry about the weight system, it works like a charm, easy to load up and even easier to remove but very secure when in place.
Just make sure you give your dive buddy a chance to practice getting them out, it's not hard, just requires one or two practices.
Jeff
(I am in no way affiliated sith ScubaPro.)