Cannot compare Molymawk to DLR, however the lady who set up Molymawk came from DLR.
Original concept when it was used at SXS was that you got an online code and the chance to practise all the tests prior to visiting the centre to do the actual one.
The idea behind this being that all aplicants would thus be equally prepared and a more accurate assessment could be made.
Have you been given this opportunity to practice?