I have stayed here many times on my way in and out of Guatemala. I can get picked up here early in the morning to go to the airport by a taxi or shuttle instead of staying Guatemala city. You can go out to lots of bars and restaurants nearby. It's much better than a hostel for a similar price. For about 100 Q you can stay and have a nice private bath and TV. If you prefer more quiet, stay upstairs. There is also free internet and a cooking area if you want to make your breakfast.

I was introduced to Posada Burkhardt by a former Peace Corps volunteer. It's apparently still a popular choice for the PC when they're in town. The rooms are very economical, about 110-140 for a double, with private bathrooms. The entire hotel is decorated in a quirky manner. The pipes are usually disguised as vines or ropes, and the brickwork is left exposed or covered with decorative stone. There are various antiques left lying around. It's kind of goofy, but endearing.
The rooms vary dramatically in size, often without any change in the price, so it's worth taking a look at the available options before committing to one. Also, the larger room near the front of the hotel faces one of the busiest streets in town, so it can be pretty loud at night.

The staff is very friendly, as well.

Although this Posada looks a bit like a hostel, it offers private rooms that are simple and clean with private bathroom. Rates at this time were 110 quetzales for single. Wonderful and friendly staff. I only wish the wireless internet was accessible from upstairs rooms.

So my husband and I decided to go to Antigua on a whim, and didn't plan or anything...so when we got there, we decided to try our luck and look for an affordable place to stay...Hotel Burkhard had vacancy! and it was cheap! it was like Q125 or so...of course it isn't luxurious, the room we got was on the second floor, which was great, because we could see the rooms on the first floor where kind of dark...also, on the second floor was a little terrace with a cute view.
The room was small but the bed was comfortable and the bathroom had hot water. Good enough.

The bottom line is: We liked it given the circumstances, there are other, much nicer budget hotels in Antigua...and it isn't very near the Central Park or Calle del Arco where much of the action in this town takes place, but I do recommend this hotel for the budget traveller.