I bought my Jetstream about 1 1/2 years ago. When I first got it, some of the fly seams were not taped, an oversight Keltys' Q.C. No big deal, a little seam grip and it was ready to go.
In four season trim the Jetstream is bombproof! Two of the poles thread into sleeves in the fly, the "fly-boy" clips attatch the fly directly to the tent bodys' poles. this tent shrugs off any weather.
When using the "soft-top" you leave two entire pole sections behind.(using only 2 poles, not 3)This makes for a very light 3-seasons tent.(my pack weight is just over 6 lbs. using TNF V-stakes)
Over-all I think this tent represents the best value on the market. True 4 season use, two HUGE! vestibules and good living space at a good price.
One complaint, all the ventilation is up high in the tent. To feel some breeze when laying down you have to unzip the bottom of the doors.