Now I'm the exact opposite.
I've owned the Lightheart Solo, sold it, and now own the Notch. Using the LH Solo in wet weather, when you open the fly, rain can get into the tent. Plus, since the fly is attached to the tent body, it's difficult to try and dry the fly out after a night of rain. In my opinion, it's easier to get in and out of the Notch in the rain without getting moisture into the inner. Plus since the fly detatches, it's easier to pack it away w/o getting the whole tent wet, plus it's easier to dry the wet fly durring breacks while hiking.