I've Been to the factory for intoto products ( wellman) about 16 /17 years ago ! Was pretty impressive back then ! Probably still is ?! All Intoto studios are franchised - they have the backup and support of area managers etc but you can't really categorise them all the same as some have years and years of experience and some are newbies from maybe another profession totally. So ask how long they've been in the business - if they answer with a Generic 'intoto have been trading since... ' then ask again - but make it clear you mean how long THEY have been in the industry !
I know this is an old post but for anyone checking. Rempp are a high quality German brand higher standard than basic German kitchens. I am a kitchen designer and have worked with many brands and these have lots of features you dont get in the cheaper brands.