The Akto has a proven track record in bad weather (heavy rain and strong wind) in Europe where that design is particularly popular. Several brands there have their own version, the Akto being the benchmark. The two "negative" points commented upon by some users are the lack of good ventilation and therefore it can accumulate condensation (this is common with the 4 season down to the ground fly and mostly fabric inner tents) and the inability to hold serious snowfalls (more than 30cm of wet snow.Some will double-pole to help with this).
Curiously there are conflicting opinions on how to pitch that design in the wind, some suggest pointing the end others the side into it.
Pretty soon we should get some reviews on the similarly designed Tarptent Scarp 1. BPL (
http://www.backpackinglight.com/cgi-bin ... index.html) are testing one right now.
The double door, partial mesh inner and the two extra poles of the TT should overcome some of the weak points of the Akto, nevertheless keep in mind that the Hilleberg has been around for many years (since 1995) and is still the dream tent for a lot of hikers.
A final point, some are unconfortable with the Akto's 90cm max headroom ( 99 cm with the Scarp 1)
Franco
BTW, I have only tested the Akto in my backyard.