As Brad said, We have been running the trekker chair sleeves with short thermarest pad combo for the last 4 years or so, and have been very happy with them. Its awesome to have a backrest while glossing or sitting around in the tipi in the evening, and having something insulated to sit on keeps you way warmer than sitting directly on the ground. For us they are a multi-purpose item. We take them along in our packs when we leave our camp to hunt for the day, and have ended up using the pads to bivy out with our emergency shelter at least 7 times since we started using them due to killing an animal late in the day, or opting to stay where the critters are so we can be one them at first light. Sure they are extra weight, but the versatility has made them worth it to us. We also run short neo air pads for our regular sleeping set up, and just fold the trekker chair/pads up to put under our feet while we sleep so that mitigates the extra weight a bit.
The helinox style chairs are awesome (several friends have them), and I would likely get one if I ever wanted a lightweight packable chair that only needed to be a chair. For now the trekker chair set up offers too many options to be beat, at least for our uses.