Garmin seem to attract a lot of negative attention on Trustpilot for whatever reason, however I can only speak as I find and this review relates to Garmin Marine in the UK/Europe. I have used Garmin regularly for marine chartplotters (3), handheld GPS devices (1) and car sat nav (2) without issue and have always been able to update software and or maps as required. However I recently bought an Echomap Plus 75sv which in itself is a nice unit. The problem was upgrading the preloaded g2 Bluecharts to the all new g3 Bluecharts containing Navionics data which was released a month after purchase and was problematic using either Garmin Express micro SD card download or the Active Captain app. (note I think Active Captain in general is poor and will not be using it) The upgrade should have been available and at no charge, I had problems with both aspects via Garmin Express. A phone call and email to Garmin UK/Europe bought quick responses although initially technical support did not know how long Garmin US would take to resolve a known issue notwithstanding g3 bluecharts were available for outright purchase as opposed to software upgrade. After waiting a few days a couple of follow up emails were responded to within minutes the second of which saw my Garmin Express account manually credited with the relevant g3 bluechart software upgrade for download to micro SD card which enabled me to update both my registered units (Echomap plus and discontinued GPSMap 551) without further ado. So thanks to Garmin Europe/UK technical support and particularly Martin for sorting the problem out in a timely fashion. If you have an issue I would suggest phoning their support line rather than using any other contact medium.