There are lots of Helinox clones on the market for far less money. Some are good, some aren't One problem with that type of chair is getting out of it to shoot without getting a lot more mobile than you like. There's no rigid frame to push down against to get up. You might need to roll sideways onto a knee, depending on the chair. Whether you can shoot sitting in it is up to you. I've never tried it.
I have one like this from Trekology for half the money of a Helinox. I sat in both and really can't tell much difference, certainly not $50 worth of difference. I can get out of this one fairly easy but still with more gyrations than is good for a blind.