It's only got one door/porch, the venting is compromised and the inner tapers enough to limit sitting headroom as you go back from the door.. All of which are addressed by the Kaitum, so that's what we use instead. The Kaitum is a better comparison to the Nallo GT, of course, where for a smidge extra weight you keep all those advantages and the contents of the porches are within reach without having to get out of bed.
Dunno about not liking as such, but for me its more the fact that they don't really offer anything very exciting compared to the competition (even if you only look at 2+ man 1 door tunnels). The Kaitum by comparison is a more more interesting bit of kit (light, spacious, 2 door, 3-pole accomodation: an unusual combination) and hardly anyone seems to be following the same design.
Never tried an Akto, but I rather suspect that in the same way as the Nallo they're just not that special compared to the competition these days. Conversely, the Soulo is unique (though because it is specialised, rather than due to the apathy of manufacturers) and a much more interesting prospect to my mind, if you needed such a specific bit of gear.
As you know, I rather fancy the Kaitum, too, but not sure about having to get in and out in the smaller entrance, the end poles of the K being the same size as the smaller one on the N. But as you have the K3, it's probably ok. Reckon the K would be tougher tho, with its third pole - but heavier. I have not felt the need to look at other designs, so happy am I with the N2, and the more recent N3GT. We'll be using that as a base tent deep in the Fannichs shortly, with double poles and guys.
