The whole city is fairly small and is extremely walkable. It takes about 20 minutes to walk from one end to the other. At any point, you can orient yourself to the central square by looking for the tall Cathedral or "Parroquia". Be sure to bring some comfortable shoes or wedges for walking on cobblestone streets. We typically use uber, but there are also taxis driving around.
San Miguel is in the mountains. Expect warmer temperatures (mid 70s - low 80s) during the day and colder nights (mid 50s).
Make sure your passport is up to date!!
There are some businesses that only accept or will give you a better deal if you pay in cash, so we recommend you have cash on hand.