Depending on the aircraft twin 430s or G1000 which is effectively driven by 430s. There is a trusty 195 in the bag - black and white it maybe but it does the job. I have only had to get it out the bag when flying something different. I dont bother in the Cub I have been flying as its fun to just use the map but without it I reckon I'd get lost in the Aztec - never could understand those strange needles.
Mind you I had the No 1 FM immune all singing GS VOR fail over Belgium earlier this year, couldnt get a signal on box 2 and the scren starting playing up on the previously fail proof 195. Fortunately you cant really get lost through Belgium - I call it fly by mast.
Edit to add - I dont know why but I plan on the Avidyne or G1000 failing one of these day so I have this cuning plan for shooting an ILS using the 195 and the standby AI
Please wish me luck.