The train was filthy and had roaches moving all over, I was uncomfortable sitting there however it got me to where I needed to be and that's all that matters.
Where to begin? Rather than flying, we wanted to see more of thailand, so went to Phitsanulok by train and onto Sukhothai via taxi (about 700baht). The train journey was "memorable". 4.5hrs from Bangkok, stopped countless times, 2nd class was basic and rickety even by UK Northern Rail standards, and the onward journey to chiang mai is a further 6hrs. But still don't regret it, and if you have an element of adventure about you, worth trying. Was lucky that we ended up in Phitsanulok during the flower festival. The night market was great, and where else can you get an hours foot or body massage for 130baht. Exchange your money before you get here and expect there to be none of the usual "tourist things" here.
Food stalls available inside at area B (maybe others too I didn't see). Best to have the Thai pay app as a lot only take QR code, but we found some bao buns and fruit sellers that took cash. Plenty of toilets though no paper. Boarding system efficient with QR code tickets.