Best and worst cabbies of the modern era?

For the purposes of this question, I will define "modern" as being after the widespread introduction of GPS into taxis in most of the world.

Best: Morgan/Lena - Season 35, Leg 5

The sisters were a hot mess that season. During the fifth leg in Jaipur, India, they completed the Roadblock in like 3rd place out of ten, only to squander this cushion at the Detour. They got impatient and switched Detours, which meant they were the last to finish the task.

During a legendary race through India's legendary traffic to avoid elimination, the sisters and engaged couple Joe/Ian were stuck at a red light. Luckily for the sisters, their tuk-tuk driver happened to know a shortcut that bypassed this light, whereas the engaged couple's driver didn't know that. As such, Morgan/Lena were able to secure 9th place, surviving the leg by less than a minute.

Worst: Matt/Redmond - Season 29, Leg 11

Because of the aforementioned integration of GPS into the great majority of taxis, it's no longer common for cab drivers to get lost on this show. But this episode proved that it could still happen. Matt/Redmond, the alpha males who'd won the previous leg by a very wide margin and never finished below 4th place, ended up far behind when their driver sent them to the wrong university. The kicker here for me is that the driver offered to give #TheBoys a discount, which was no doubt a slap in the face when all they wanted was to get to the Roadblock as quickly as possible.

Admittedly, it is worth noting that Google Maps works poorly in South Korea due to a security law in the country. I believe this stems from the ongoing frozen conflict with North Korea, but I'm not an expert. As such, this might have been a mitigating factor in the cab driver's confusion, but it didn't save Matt/Redmond from their third 4th-place finish. Unfortunately, this time, 4th place meant getting eliminated.