Summary: We use the 400i in our boat. It has worked flawlessly for four Seasons now. Very durable, has survived some pretty rough rides and several drops to the floor. :( Love the dashboard feature, it's very much like what you have in your car, total miles, reset-able trip mi, running speed and saved max...
Summary: The 400T is for T terrain 400i I inland lakes. The details on the lakes are sketchy but its covering the whole US. So a lot of lakes won't show the topo but living in MN i know it at least shows all the creeks ponds and lakes and has them named.
Conclusion: I posted the results of my visibility comparisons here today. Visibility Comparison: From left to right: Garmin MAP60CSx, Garmin Oregon 400T, AT&T Tilt. The AT&T Tilt is a cell phone with a 'touch screen' and an internal GPS receiver.
Pros: Good visibility compared to other 'touch screen' devices.
Cons: Should be provided with a good quality screen shield.
Conclusion: The touch screen is a pleasure to use, even with wet fingers. This device has great feature for fishermen - the detailed and accurate maps of over 1,000 US lakes. Before I had a Colorado from garmin and I always felt like my colorado should have had a touch screen.
Summary: I bought this for my husband for Xmas and we have been using it right out of the box. I showed Lakes, ponds, rivers, and creeks. I've lived in South Carolina for 24 years and there were creeks and ponds I didn't know about. My husband is a Bass Fisherman and he is going to use it for Tournaments.
Summary: Let me first start off by saying I love the Oregon series. But I returned my 400i to Amazon after less than a week. I ended up with the 400T and think it's wonderful. The touchscreen interface is much easier to use than my previous eTrex Legend HCX and my 60CSX.
Summary: Purchased this unit for use in a sailboat, gave the unit a try in the car first. In the sunlight with sunglasses this unit is impossible to see, sunglasses off is not much better. I would not be able to see this unit in a bright sailboat! Sent the unit back, will stick to a gray scale screen.
Summary: EASY TO LEARN AND USE CLEAR PICTURE TONS OF OPTIONS ON THE THING. EASY TO SEE IN THE BLINDING SNOW USE IT FOR ICE FISHING IN MICHIGAN. TRACKS SHOW UP REAL CLEAR AND THEY ARE PIN POINT ACCURACT.SPEND THE EXTRA MONEY IF YOUR GOING TO BUY A NEW GPS AND YOU WONT BE DISSAPOINTED.BEST ON THE MARKET...