Like many I have been struggling to fly real SIDS and STARS with the Navdata being over 2 years out of date on the F1 GTN750.  They have been promising a more recent Airac at some point - but no dates.  For example the routes available at KSAN were less than 50% of those listed on Navigraph! I purchased the RXP GTN750 today and was delighted that it's advertised 1803 Airac was 100% complete at KSNA (apart from a couple of number variations).  Not only that but the RXP shows vertical restrictions more clearly and I found the VNAV process much better.  I've had the F1 GTN and then their Complete and they are usually great - but their support process and outdated data got too frustrating for me   F1 will probably sort themselves out eventually  but for now I love my new RXP!!