I bought a true 200 mbit package and can hit about 231 mbit in a Thai speed test. 
International download speeds have a sustained peak at 6 mb/s / 50 mbit.

 

How is True’s fiber in comparison? How are your speeds in central BKK ?

No-one has True fiber? Even if outside BKK?

Have been on True fibre in lower Buriram for 3 years. On a low package which has been increased from 30 to 50mb at no extra cost. With TV as well no problems. Downloading of a season of a TV series is fine. Not as fast as our UK 250mb connection but reasonable. At the end of the day I've no complaints. 

I see. I already have 200 mbit but here they are offering 1000 for 200 baht extra. Might take them up on their offer.

Here's an update: I ended up getting 500 mbit download / 500 upload  instead of 1000 download / 200 upload.

Speeds are amazing, I have hit 530+ mbit both in download and upload. That's 67 megabytes per second!

 

I prefer to have 500 / 500 but I bet their 1000 / 200 can hit the advertised speeds.