This hotel should probably be rated higher on tripadvisor. The room was amazing. Huge, living room. Modern washroom. Wifi was strong.
Front desk has an English speaker during business hours. At night, and evenings, limited English, but nothing that Google translate and some charades couldn't handle.
Only downside - tours offered by hotel were WAY too expensive. I got a much cheaper rate by phoning some agencies. I phone VIP tours in Asuncion - good English speaker, joined a group tour for a much better rate (33% of if I went with the hotel recommended tour).
Overall, excellent experience here, excellent location in centre of downtown, great staff.