We recently sold our home and moved to a retirement community, but we did have a fireplace in the home we sold. It had two fireplaces...one in the family room, which was a wood burning fireplace with a gas fire starter, and the other was a gas log only fireplace in the formal living room. We had had wood burning fireplaces in former homes we'd owned, and where we lived it didn't often get cold enough to really mess with a fire, so I talked my wife into getting a very nice set of gas logs...thinking it would be more convenient and largely decorative.
The family room was pretty big, about 30 x 30 (it was a large home, 4000 sq ft) and the gas logs were pretty but didn't warm the room. I could turn them up as high as they would go, but unless you were right up next to the fireplace, you really didn't feel much warmth. In the 14 years we lived in that home, we only had a couple of really cold winters, so it wasn't too bad, but when it was really cold I sure wished we'd had a good old wood fire.
I did like the convenience, not having to clean out ashes, bring in wood, etc, but if you plan on using the fireplace for heat and not decoration, I'd strongly recommend wood burning.