The S6 MaxV was already very good and was constantly optimised through many firmware updates. In my opinion, the surcharge is far too high. An S7 MaxV is already better in navigation, but not more than 250 francs better. The wiping function has of course been improved in the S7, but if that is not an important criterion, cleaning, finding one's way around the flat and reliably locating the charging station, the S6 MaxV can also do that excellently well and it also recognises objects reliably.