Depends on your area aswell, built up areas suffer with reception, along with areas with little signal.
On ebay you can get a booster receiver which goes from the aerial to this box, then to the head unit.
No mines fine only thing I do find frustration is you can have dab in get out of the car then get back on start up & it'll have switched to normal fm. Also sometimes stations are there saved & some times not. But other than that well chuffed. Considering I didn't know I had it
DAB isn't the wonderful service that was promised, a bit like CD's were shown to be indestructible when they were first introduced.I really like DAB, radio 6 music is my station of choice but if you have a dodgy reception then you can lose signal.
I found in the short space of time we had on it worked a little better than FM. It worked well around central Scotland giving even better sound quality then FM and when up in the rural areas where FM usually cuts out DAB did last longer than usual but did cut out in the end. But DAB isn't fully functional as FM threw out the UK with it being newer and a working progress.