Never confuse a wine cooler with a wine cabinet. Wine coolers are intended only to provide a specific temperature. They are not suitable for conservation.
They are perfect for the bar of a gastrobar or a kitchen to have the wines at hand and drink them at their proper temperature. However, by the placement of the wine bottle (standing), a simply ambient humidity together with a non-exhaustive anti vibration system and without any protection from ultraviolet rays the only proper purpose of these coolers is the the “fast” consumption of those bottles (2-3 months).
In favor we have to say that for quick consumption, bottle coolers are of the family of “wine cabinets” the most convenient device for the punctual and handy service of a few bottles of our favorite wines or champagnes. You don’t even have to open any door to take the desired bottle.