I have the hot maps gold which was around $200 and in my opinion its not worth the extra money. I had the basic hot maps card in last graph and it was just fine. When I bought my unit they didn't offer the navionics card for hummingbirds yet. With the gold card I can see every lake on the eastern side of the US. For a $100 bucks more you get an aerial overlay of the land but honestly I could care less how many houses and trees are laying above the lake so if I had it too go and do over I wouldn't buy it again. It was of no concern too me but the hotmaps cards are not as detailed as the navionics I've seen either but they do just fine for me, all I wanted was depth contours and for that the hotmaps is fine. If u do decide on a navionics card I would be eager to know if it is better than the hotmaps though.