There will always be hidden costs if you only select samples after signing (especially when the kitchen is quoted as an all-inclusive flat rate) and you don't want to settle for the simplest offered equipment in the end (e.g., with around 30 power outlets and a network socket, carpets in living areas). And what the salesperson says: "we already have a very high standard in the basic equipment, prices will rise in two weeks and of course we are already voluntarily complying with all 2018 regulations" (just ask the salesperson for fun which ones those are, for example, HC granting a 14-day right of withdrawal was not the case at least a few months ago) I wouldn't always believe without verification. And always keep the seriousness in mind: the company has been on the market here for four to five years, was very small until recently, now a huge growth is being focused on, legally a German GmbH, which cannot be equated with the parent company from Denmark!! Payment only upon handover of keys does not protect you at all against insolvency during the construction phase, because then partial payments would have to be made anyway... if you like the company's style, build with them but check the contracts carefully and try to have as much as possible sampled beforehand and written into the contract. Verbal statements about "this will cost such and such extra" are, according to experience, worthless and later no one remembers them...