None, it has exceeded my expectations in almost every way. But I went in expecting a fairly basic modifiable heavy duty 4X4 not a luxury mall crawler, and I learnt to drive in a Range Rover classic. I have had no build quality issues or electrical gremlins (except for the GPS not working over 20kph), it’s built like a tank and I find the interior fit and finish to be excellent. Sure there are things that could be done better (RHD footrest issue & offset accelerator pedal) but the massive list of positives far outweigh the few negatives.
I appreciate “tool” products that are designed for function but are totally over engineered, the Grenadier perfectly fits that description.