This thermoelectric cooling technology in this product chills wines by 15 to 20 degrees below ambient temperature. It relies on having an environment with good ventilation, because the product works by creating a temperature potential and drawing warmer air out of the back of the unit through a combination of heat sinks and fans. The reason that this is cost efficient is that it it requires less energy than a big computer to operate the electronics and the fans.
This type of system is actually easy to service too. There are two parts that break: the thermoelectric unit and the fans. Neither is expensive to replace and (while it voids the warranty), any person able to use a soldering iron should be able to do it. Compare that to fixing a freon based system and it's clear that thermoelectric units can cost less over time if you have the skills and time to maintain them.
However, the operating environments where this type of unit will succeed are limited. If you always keep your home at 70 degrees or less, with little variance, then this unit can do well in it. Because of the way that the unit works, you can't place it in a 'warm spot' of your home. I experimented with several different placements and none work particularly well because the unit needs to be in an area with high ventilation and stable temperature (i.e. a basement of an air conditioned home) but the fans make too much noise for them not to be intrusive if you're watching TV or having a conversation. When you combine the ventilation and noise issues, the only environment that makes sense to place this unit is in a room that already houses your water heater, furnace, etc. I can't imagine putting it in a kitchen. A closet won't work (because the hot air rises in the closet and won't be flushed). And most other rooms in the house won't benefit from the addition of a noisy appliance.
Once you get past the limited range of placement options, the unit itself is not very good at temperature regulation. Setting the internal temperature of the unit to its low (39 degrees F) causes it to run continuously (in an air conditioned, high ventilation environment with an ambient operating temperature of 60 degrees or higher). Raising the internal temperature setting of the wine chiller to be 50 degrees placed it inside of it's 15 to 20 degree difference with the ambient air (in my case, 65 degrees) yet the internal temperature of the unit varied from 41 degrees to 61 degrees depending on the location inside of it (the top row is the warmest and the bottom row is the coolest). I measured the temperature variances over time using NIST certified Thermoworks data loggers with 1 bottle per shelf staggered on the diagonal.
An additional problem with the unit is capacity. The 32-bottle system has 8 shelves with nooks to store 4 bottles per shelf. I had to remove 1 shelf because most of the wine that I buy has bottles that are simply too wide to fit on a standard shelf layout. Then I adjusted all of the shelves to achieve the proper spacing. Additionally, wide bottles don't fit particularly well in a row, which can reduce the total number of bottles per row to 3. I alleviated this problem for some rows by alternative bottles stored with the bottoms toward the rear of the unit with bottles stored with their bottoms facing the front of the unit. This is awkward on the shelves but increases the storage capacity. The top shelf loses two bottle bays to the temperature adjustment electronics, so the total capacity is between 26 and 22 of the bottles that I actually own.
I mentioned earlier in the review that this unit is going to have service needs. The heat sinks and fans are going to get dirty (especially if you have pet hair in the air), which will cause chilling performance to degrade, and the fans and the thermoelectric coupler are going to fail every few years. The parts may even last 3 years, which is the warranty period for this device. However, the shipping costs to have this item fixed are more money that it would cost a knowledgable handy person to service themselves. If you are one of these people, I wouldn't bother with the warranty. If you are not one of these people, you should expect that this thing is going to break every few years and you will need to buy another one or be without it for a month or two while it is fixed. In this sense, I think standard freon cooling systems units can significantly outlast this device, but handy people can more easily fix this device than a freon cooling unit. It's a trade-off.
Given the 32 bottle wine chiller's cost and the cost of energy in the Seattle area, this kind of unit can be attractive (compared to the $200 low end wine chiller at Costco) if you have the right placement position in your home and you can handle the maintenance or replacement issues. Is it better than other thermoelectric wine refrigerators? I doubt it. The internal temperature variance is so large that it is difficult to imagine that it could be worse. The fans are probably better than the fans in the cheapest unit you can find, but the thermoelectric coupling components and heat sinks are standard parts used in every unit of this type.