My husband and I stayed here for one night while visiting family in Truro. We paid £68.50/night (including breakfast) for a double en suite room.
The Carlton Hotel is a traditional small-town hotel. As other reviewers noted, the hotel's decor was a little dated but really nothing that would stop me staying here. In a way, it's quite charming in a retro kind of way (although admittedly if I had been looking for a romantic getaway rather than visiting family I might have thought otherwise!).
Our room was a reasonable size, clean and comfortable. We were more than happy with it for a one night stay, even though it was more functional than luxurious.
I noticed that other reviewers here commented on carpets in the bathroom -- I'm not sure whether this is the case now throughout the hotel, but our bathroom did not have a carpet. It had some kind of lino-like covering (rather than the tiles or similar you'd find in more luxurious hotels...like I said, quite functional). We had a shower cubicle in our bathroom (ie no bath tub) -- I noticed one reviewer said they only had a bath so if you prefer a shower there are such rooms available to request.
Breakfast included both a cold buffet (cereal, fruit, yoghurt) and a choice of made-to-order hot items (basically a full English or any items from it eg I had scrambled eggs on toast), plus tea, coffee and juice. (It was only served from 8.30am-9.30am though which we didn't think was very long -- although it was a Sunday so perhaps there is a bigger window on week days.)
As well as the breakfast room, there was a bar and lounge for guest use. Wi-fi was available in the guest lounge (although not in the bedrooms). I believe there was also a spa-bath/sauna leisure facility although we didn't have a chance to try this. The hotel also has its own car park.
The staff were friendly and helpful. We actually arrived on the overnight sleeper train from London so arrived at the hotel about 7.30am -- as our room was ready they let us check in then which was very helpful.
The hotel is walking distance from Truro town centre but note that this is up a hill. Truro itself is a pleasant enough town but there's not loads to do there -- it's reasonably easy to get to places like Falmouth and St Ives though.
Overall, I would stay here again, especially as there doesn't seem to be a large choice of hotels and B&Bs in Truro. Perhaps this shortage contributes to the prices, as I did think nearly £70 per night was a little expensive for what it was. It it had been £10 less I would probably have given it four rather than three stars.
This review is the subjective opinion of a TripAdvisor member and not of TripAdvisor LLC