I was dissapointed to see that flight plan credits expire after 12 months, this feels a bit like a rip off, whilst £10 for 20 credits (ie 50p per flight plan) is not expensive it does start to become expensive if one only has a need for fewer plans per year, I cannot see the justification for expiring credits after a year as they are an extra item purchased on top of the annual flight planning subscription. It would be nice if the annual flight planning subscription came with a few (say 5) credits built in, that way one would not feel ripped off.