Hi, I'm looking for a new kitchen and found out that there are a lot of online sellers doing doors from the same brand, I.e. Second Nature, but carcasses they source from somewhere else, so there is no way to understand the quality until you receive them. I'm really concerned about it since doors can be replaced relatively easily but it's carcasses which make kitchens to last and comfortable to use. To be precise, I found a seller which sounds good on description of units and their customer service is way better than DIY-kitchens and they are much cheeper as well - how can I be sure about quality of their units???