The first impression in a nutshell: big, red and heavy. As the backpack is not a real toploader with a lid, as would be usual for the size, it initially looks bigger than it is, but of course 40 liters of volume have to go somewhere. It is also rather heavy, even for an avalanche airbag backpack. The workmanship is very good. The same applies to the features. The backpack is not only equipped with the rather elaborate "Swing-Arm" carrying system, in which the shoulder straps are not firmly sewn, but "sliding" attached. The Saga 40 also has two access options to the main compartment, namely from the top or via the back section. Of course, the backpack has a compartment for avalanche equipment as well as a lid compartment and another separate, small inner and outer compartment. There are also 2 small compartments on the hip belt, although only one can be used to stow energy bars or other small items. The other houses the safety belt, which is passed through the crotch and prevents the backpack from being pulled over your head in the event of an avalanche.
Skis can be attached diagonally or vertically at the back of the backpack and hold well there. Of course, there is also a helmet holder and the Saga 40 also offers many sturdy plastic holders to which things (e.g. a water bottle or climbing equipment) can be attached with carabiners.
The Jetforce system
In contrast to virtually all other avalanche airbag systems (with the exception of the new Arc'teryx Voltair), backpacks with the Jetforce system do not use compressed air (or compressed gas) to fill the airbags, but instead use a nozzle to draw in ambient air. This offers several advantages over "conventional" systems. First of all, a Jetforce backpack can be deployed several times without having to insert a new cartridge. Once you have deployed the airbag, all you have to do is deflate it, pack it properly in the compartments provided and you are ready to go again. Of course, this advantage is not only useful in an emergency (we really hope that nobody gets caught in an avalanche several times a day!) but is also very practical for practicing. As you only have to charge the battery at some point and there is no effort or cost involved in deploying it, you can test deploy the airbag very often for practice purposes and to get used to the system.
Another advantage is that it is easier to take with you on the plane. Anyone who has occasionally (or more frequently) traveled with a classic airbag backpack on an airplane knows the problems that always catch up with you at check-in or security check, despite prior registration and a printed IATA slip. In theory, you shouldn't have any problems with a Jetforce backpack when traveling by air, although I would still be prepared for a few questions at the security check (and of course the backpack has to go in your hand luggage because of the battery). There is also no need to get a new cartridge or charge an empty one anywhere - charge the battery and you're done.