I have the new Ultra 6000 and am waiting on the arrival of the 1800. I returned my 1850 (Icon) for the sturdier frame that comes with the new Ultra. It is more stout and does not have the tabs on the bottom making it more durable in my opinion. Less pockets and very streamlined which is okay for me but may push others away. So far I have logged some miles with a 50lb sandbag on the load shelf and some gear inside and I love it. Only gripe is the shoulder pads could be a little thicker, lumbar support is good and the load lifters are clutch. True test will be this September (hopefully). For both packs (6000 and 1800) with 1 frame/suspension that I can change depending on the hunt and the bow bucket it was less than $500, good deal to me but to each their own.