I've been lugging large amounts of surveying kit up and down the Pewsey Downs in my Stingray for the past couple of weeks.
I'm very impressed with the stability and comfort of this pack and its ability to swallow considerable amounts of kit. The PLCE pockets are really roomy and mean that my lunch box, flasks, gloves, hats etc are all very easily to hand.
The back system is a modernised version of the old Lowe Alpine Parallax system they used in the 70s and 80s when Lowe were gradually going bust turning out items of exceptional quality from their factory in Eire (I've got a Cerro Torre 65 of that vintage - my main travel pack and unbeatable, in my opinion, for comfort). You can even remove the aluminium stays from their sleeves for packing the rucksack away.
The only criticism I have is that the elastic on the lid is a bit fierce and you have to get assertive with it at times in order for it to covering the main opening correctly.
All together, though, I'm extremely happy with this pack.