Which one to use?
After trying both I have come to the opinion that Tuk Tuks are not a good idea.
They are unmetered and the over enthusiastic drivers get a little animated followed by some probably colourful language if they don’t get your business.
Some of the looks I have been getting from these grumpy buggers who don’t take kindly to me bartering them down have been nothing short of amusing.
Not so for 
Next minute she was in a Tuk Tuk and overtaking our cab.
Joy is taller than average for females from this part of the world and we had to contain our taxi driver from getting out of his cab at some traffic lights to fawn upon her like some gibberish love struck fool.
The Tuk Tuk sped away at breakneck speed and he just couldn’t keep up.
The driver was severely distraught having missed his once in a lifetime opportunity at meeting the lady of his dreams and dumped us in the wrong location probably on purpose.
What a twat.
After being ripped off we arrived to find Joy already there. I told her the story and we had a good laugh about it.
If you use taxis then insist they switch on the meter and you will find an air conditioned vehicle that can’t rip you off.
The Bangkok drivers don’t appear to have any geographical skills whatsoever.
You need to hand them your phone in order for them to get to your destination.
I secretly took these pictures while heading back to the hotel earlier with 
Unlike London cabbies who know exactly where to go these guys know bugger all.
Even locations of large prominent buildings are mostly unknowns.
We experienced a lot of head shaking before resorting to maps.
So if you come to Bangkok then download the offline maps from the ‘maps’ app on your phone and be prepared to tell your driver where to go.
Otherwise you may be looking at paying to go somewhere close but not quite where you want to be at best.