Just wondering if anyone has used any of the GPS training products on the market. I am training(IFR) in a newer 172 and it has a KLN94. I am having a heII of a time working with it. Has anyone used the ASA-GPS trainer. It is a tad spendy, but after my stg3 check, the chief pilot said I WILL know how to use it inside and out by the time my checkride comes about. Thanks in advance.