Hi sweetshot,
There have been several previous threads on Southern Leyte, so you should try doing a search. Here is one of the threads from before:
How about Southern Leyte??.
When I stayed at Peter's he was just building his cabins and I stayed in the main house, so I can't comment on the cabins, but I would anticipate they are relatively basic. The diving was fantastic and my understanding is that the season for sighting big stuff is Jan-Jun, so if you are there in May you should be OK.
Enjoy Southern Leyte, I'm jealous!
Drew