Yeah, it's not a lot of heat, but it starts making a bigger difference once you've got the fridge packed full of stuff (less air loss, also makes it take longer to find stuff, so the light stays on longer). I've had items at the back near the bulb get extra freezer burned because of the constant heating/cooling. That was quite an old fridge/freezer though, so not the most efficient to start with, and the temperature control could have been better.

I do love chest freezers. They're way more efficient and I find a lot easier to organize too. There's some fridge/freezer combos that have a freezer drawer, but I've yet to find one that's fully enclosed so all the cold air stays in. Most I've seen have wire baskets or something for the drawer... Having space for a separate chest freezer is not a luxury everyone has.