I just stayed here for two weeks on a business trip, and it's all been said already. The staff speak little to no English, but they really know how to run a hotel smoothly. My room was spacious for the price paid, with a nice A/C, TV, and shower. It also came with a small patio / safe zone (for earthquakes and emergencies) that had a few tropical plants. Daily housekeeping was great, and the breakfast crew will cheer you up as you start your day. The portions are somewhat small, but it's good homemade (made to order) ...and it's free. Overall it seemed like a mostly younger/local crowd, but with the exception of one night things were very quiet by 9 or 10.
It's easy to catch a cab, as there are three drivers who hang around the front entrance most of the time. I got overcharged pretty obviously on my one ride down the street in a rainstorm, but there's a pricing chart available for common destinations (and you should always ask ahead of time). The reason I didn't need cabs is that the surrounding neighborhood has 8-10 very good restaurants within a 5-10 minute walk. I highly recommend The Green House and Pomodoro for "foreign" cuisine, and any of the local small cafeterias for assorted Salvadorian lunches. The area is relatively safe (largely residential), and there are guards on just about every corner any way (as is standard in the city). The two museums (MARTE and Museo de Antropologia) are both within walking distance, and the latter gives a wonderful history of the country with most exhibits translated into English.
If I'm nitpicking, the only complaints I can come up with are some small stains on the sheets and the noise on the patio when it rained. Neither of these would prevent me from returning.
On the other hand, the wi-fi was outstandingly reliable, and everyone on staff was happy to have you staying with them.
**Heads Up** They charge your card the full amount upon check-in, which surprised me but ended up not being an issue.