I have tried a few harness from elk river. The Peregrine is the best (lighter weight). This harness does have an extra shock absorber in the back which causes it to be heavier and hotter. The seat is not fully adjustable as I have seen with other harnesses. So I would say it is a good comfortable harness.
With items like this I am always skeptical but I have cold feet so I decided to try them. I am very happy with the heat output for such a small, lightweight battery. I wish they lasted a little longer so I did purchase another set of batteries. All in all they are working better than expected.
As with any lanyard from DBI Sala and at this price point, build quality and materials are top notch. Why only 2 stars then? The rebar hooks are EXTREMELY difficult to operate. The design is horrible. You can be sure these gates will never open accidentally, because it takes a minor miracle to get them open intentionally. There is a complex system of cams and slides in the gate that does a great job interlocking the gate to the hook.. But makes gate lock release not smooth at all (despite trying to lube it). The lock release is positioned in a way that makes it very awkward to operate. Pressure on the gate causes the gate lock release to lock up, so you basically have to squeeze the lock release without putting any pressure on the gate itself.