Robert, I also ate a little crow. . .
I thought twice about adding the streets to the unit. . .Especially since I had a 2 GPS's that had streets in the first place.
I have been using Explorer units for backup flying, along with my GPS units in my Cherokee 180. I took a 600 mile one way trip to Houston Tx. . .Sugarland International to bring my Mother to the MD Anderson Cancer Center. Those explorers had all the airports, cities and even streets. They did good enough.
So I purchased this I 700. Totally by word of mouth. I added the streets (with hesitation).
Not only did the I 700 do wonderfully well with tracking my progress the second time there, but the streets did a far better job than my older Explorer unit. It was well worth the extra money. Even my mom could use the unit. . .(Now that is scary. . .)
There is a very good marriage between the systems. . . A totally versital unit that works well in the air, as well as the ground. What more could you ask for?