～心地がいい is a useful term which can be applied to many situations.
心地 (ここち）means 'feeling' or 'sensation' and when you combine it with other words, you can express a range of phrases to do with comfort. Note that the ここち becomes ごこち when preceded by other words. Here are some examples:
居心地がいい cozy, comfortable
乗り心地がいい comfortable to drive (a car, a ...
I'm just going to go word by word here:
慰め (nagusame) has to do with comforting someone who is grieving or suffering, and is almost certainly not what you want.
便利さ (benrisa), also 利便性 are words that describe the most standard meaning of the English noun convenience in the sense that being able to walk to work is convenient.
However, it doesn't sound to ...