The room itself was fairly dismal and spartan. The bed was comfortable and clean enough, the air conditioner was very effective and we had over 100 channels on the satellite TV. The bathroom left a bit to be desired, but we were only there for one night. We had to go out and ask for a second towel then toilet paper - we really don't need to stay anywhere this poor, but there really wasn't an alternative. The cheapest rooms here are A$3.40/£1.60 night.
Our brief (but adequate) look around town showed most of the guest houses and hotels to be about the same from the outside, although to be fair we didn't actually look at the rooms of any of the others - there was no point. If we make this trip again, we'll opt for the early start. One hotel looked quiet good in an information book - swimming pool and internet access, but we went into the bar (when we eventually found it - new name) and got bad vibes from the place, turned around and found another bar with a bit more ambience. And pretty good food too - if you are ever unfortunate enough to spend the night here, I can thoroughly recommend Bob's Bar (Bob is English/Aussie), which has a good menu, good food, and ice cold beer.
Would we come to the Riverside Guesthouse again? Not a chance. If you're heading from Trat to Phnom Penh or Sihanoukville, do yourself a favour and get up early. If your heading from Koh Chang, overnight in Trat not here. It just isn't worth it.