Was that target tent bug proof with the door of the tent open ?
BTW, I do find the "no fly" bit rather odd because they are in fact mostly a fly as opposed to an inner.
If indeed there was no fly you would be in troble in the rain.
To explain I'll use the Tarptent Moment as an example.
The first version was indeed a tarp-tent, that is a fly with a partial inner attach directly to the fly so that you have a floor and a bug proof interior :

- Franco's Moment.jpg (38.58 KiB) Viewed 6768 times
the later versions became the Moment DW , double wall , so now the two (inner and fly) separate
however the 'fly or no fly" is the same (apart from some minor cosmetic differences)