Based on what I saw on the news this morning, Langano Skies may no longer be an option. I have a feeling it is one of the business affected by (not sure how seriously) the fire at 99 and Whyte last night.
Blue Nile, Langano Skies and Habesha are mentioned frequently. I can't comment on how they compare other than Blue Nile is the longest in operation in Edmonton. And that service can be very slow at all three.