I'll reserve judgement until I've written in one but I find the standard ADL specification seat as fitted to a lot of their stock built vehicles actually more comfortable than the high backs that Lothian have been using. If this is the case with these then they could rapidly go up greatly in my estimations
I've travelled recently on the stock batch (ADL E40D) Newport Bus have with the same seats. My immediate impression was they were more comfortable than the seats on the MCVs and XLBs and streets ahead in build quality than the first production batches of E400mmcs.