Contactum full RCBO boards is all I fit now as I also get a good price from my wholesaler.
DB itself is very well made, has plenty of room inside for the RCBO's and to dress the cables properly, RCBO's/MCB's align correctly on din rail and don't appear twisted when the cover is on like some other brands!
RCBO trip times are pretty consistent around the 28 ms mark on 1x and 5x, haven't had any faulty modules yet (touch wood!) and fitted around 80-100 of them.
Only gripe is I don't think they're the prettiest of units (compared to Hager) and not a massive fan of the labels that come with the DB, you get a choice of using either red or green coloured text on a white background - I use my brother label printer which keeps my OCD at bay.