Stayed here for 5 nights. We found it expensive but the choice was limited in San Pedro. First choice would have been Kimal which was fully booked.
The room was clean at all times, the breakfast buffet was good, all day long tea and coffee was a nice touch, staff were pleasant.
The hotel is a walk from downtown and at night you should have a flashlight since the street lights don't seem to work.
Restaurants in San Pedro are numerous and offer good value. Our favourite seemed to be Todo Naturale where we ended up on several occasions.
Anyway memories are what really count....

The pictures of Don Tomas on its website don't do the place justice. Long, low buildings set around a big gravel courtyard don't make for pretty photos. But inside rooms are a reasonable size, clean and comfortable. We stayed twice over a period of two weeks - took time out to go to the Bolivian salt plains. Found the staff always helpful - giving us packed breakfasts when we set off pre down for Tatio Geysers. Booked via the internet and they managed fine with the changes etc we made.

Lounge area - next to breakfast cafe - has wireless internet. The pool is tiny - and almost unbearable freezing! Which is a shame as the days were very hot and even a plunge in would have been appreciated. San Pedro is a tiny place and it is nice having the short walk in to the main streets - quieter too. Go stay!

I booked this hotel because a colleague had stayed in it and said it was fine. I think that is how I would sum the hotel up... "fine/average/functional". There is no wow factor but it does the job.

It is aimed at the non-backpacker, mid-range market

San Pedro is purely a tourist town (but don't let that put you off, the town is bizarre, interesting and fun with fantastic craft shopping). The hotels therefore have no problem being filled and therefore any mid range hotel of this sort doesn't really have to try very hard.

The upsides:
The beds are comfortable,
The rooms are spacious and spotlessly clean,
There are heaters in the rooms (which was particularly lovely in May when it was freezing at night)
The staff are extremely helpful (although they won't ring anywhere to help you book anything - they just point you in the right direction).

The downsides:
Given that the prices in the rest of Chile are so reasonable this hotel was quite pricey for what you got in comparison.
The breakfast was fine (if a little basic) and if you are a minute late for breakfast it has all been cleared away and they won't bring it back.
The hotel is about a 7 minute walk from the centre of town. It's extremely safe but, particularly when it is cold in winter, it is a bit of a drag in the evening to walk in (in sub zero temperatures). This doesn't sound much but most of the other hotels are much closer in (although I suspect they may be quite noisy at night whereas the Don Tomas was very peaceful.
It's not a comfortable hotel where you can just chill out if you fancy a day/afternoon off sightseeing (which you may need if you do all the early morning tour trips!).

Would I stay there again? Possibly, although I might look for something a little more central which has somewhere comfortable to chill out for a couple of hours if you need to.

Last May my nephew and I went to Atacama. Since ours contacts by internet in order to arrange everything of our stay until our welcome reception and stay, the hotel´s staff were perfect.
Besides its location, charm, and infra, this hotel must be very proud of its staff.