Now that seatcounter is funding interruptis, I want to sign up for the paid versions of either KVS or Expert Flyer. I notice that KVS costs $5/month, but needs a 3-month min ($15), while ExpertFlyer has the pay-as-you-go option for $10/month.

Any recommendations from folks who've used these tools? Perhaps this is obvious, but I will be using them to check for UA upgrades and *A awards availability.

Cheers!