i have a hennessy hammock and was considering moving over to a clark for the extra space. can someone who has experience with both give me a run down on the differences? is the lack of insulation through the bottom still a problem (i get cold on my back even at 45-50 degrees in the hennessy). is condensation an issue? has anyone every tried to use one as a ground bivvy? i know they aren't as comfortable like that but its nice to have the option in case there are no trees. i am looking at the flex 180 and read the threads on here about it, is anyone able to compare the flat lying ability of that versus the hennessy? finally, i hang with my dog. in the hennessy its possible but tricky. would it be fairly easy in something like the flex 180? thanks for the info peeps.