My platinum subscription to KVS has just expired, so I'm pondering the same issue. Never used Expert flyer.

I really like the non-web spreadsheet-style interface of KVS. (There's a web one too.) Just seems to make it clean, compact and fast. I always have my laptop with me when I travel - and generally have internet access so its no problem you have to use an app rather than a browser. Is there a similar app you can download re. Expert flyer?

I fly with EVA more than anyone. But I find availability just doesn't match what's available through EVA's own site. Eg a flight I was looking at a couple of days back. KVS shows (which ever system you use) available in Y but no C. EVA's site was showing the exact reverse. I suppose this has got something to do with airlines not releasing inventory to the world at large. Really I don't know anything about these things. But would Expert Flyer be any different - ie ultimately is the data coming from the same source(s) as KVS (on platinum)?