I've got one already and I'm looking to get another because I've "overfilled" the fridge with all the wine I want to keep long term. Previously I used to store most of these long term cellaring wines at a wine storage facility, but the cost involved made my decision to buy a wine fridge easy. I've only got a modest collection of wines - around 150, but the one's in the wine fridge are some of my very good wines which I've bought for collecting and/or drinking on special occasions - such as some Penfolds wines - Grange, RWT, 307's, St Henri's, some Cullens - Diana Madeline, some Henschke Hill of Grace, some Chateau Mouton 2000.
Then I've got a lot of what I call everyday drinking wine - Amelia Park, Glenlofty, Hewitson, Wynns VA/Black, Cherubino etc....which I'm storing in my bar but with some of these I'd like them to put into long term storage (i.e. if they are in the wine fridge, I'm less inclined to open them after having a few!), so for that reason, I'm getting another 30 bottle fridge.