We travelled in july and august with Ethiopian Impressions in the North of Ethiopia. This is a Dutch company who deserves a recommendation, as they did a wonderful job.
Bradt is a very good guidebook, hotels were ok!
Gheralta Lodge in Tigrai is great to stay there in between, nice place and comfortable rooms, Everyone seems to like the food there, it was ok, but for the price we have paid, the breakfast was not good! There was no bread, no toast, no milk, no cheese(just marmalade). We have stayed in more moderate hotels and even there , the breakfast was much better.
Gheralta was top, except the breakfast!