For about 2 years now I've been one of thousands satisfied users of SL1, but there's a 'but': I found it miserable in prolonged rain. When it pours constantly day after day and you can't dry your stuff, the fact that you can't enter/leave the tent without letting the rain in, starts really to hurt. Even more disqualifying is that you can't cook inside. For me, it's a great tent for an overnighter or a weekend, or when I go with friends sleeping in a larger tent where we cook together, but for anything else I'll have to find something else.
Know, wouldn't it be nice if Big Agnes made an XT version of this tent, with a small arch pole over the doorway and extended porch, like in mountain hardwear airjet 2 or vaude odyssee ? It shouldn't make it heavier by more then 200g but it would become much more versatile, and still considerably under 1.5kg.
Who would like such a fly? Maybe if enough people get together it would be possible to have it made, or at least petition at Big Sky?