I've been lurking around here for years, figured I'd put in my .02c
Ipurchased the 66i about a month ago, dont bother wasting your time or money. First off, the resolution is so bad that satellite images are unrecognizable on places I've been to hundreds of times. 240x400 pixels is actually lower resolution a 10 year old phone. The weather features are not accessible without cellular service and synced to your smartphone, which defeats the purpose of carrying the garmin. If you get lucky and manage to sync your devices, expect crashes, glitches, lostconnections, data deleted,low battery life, and nothing but problems. The garmin requires 3hrs of updates right out of the box, and two more within the next week. There is no online customer service for the 66i, the controls are clunky toggle pads that are very frustrating. Battery life is 8-12 hours if you are actually using it, 16hrs in sleep mode. Texting is done using an arrow hovering over a keyboard screen and is slower than a carrier pigeon. Birdseye maps are not included and must be downloaded 2sq miles at a time .
Easily erase stored tracks by accidentally pressing the wrong key, the menu is layed out very poorly and the arrow keys make it difficult to navigate efficiently or consistently. I highly recommend you get your hands on one and try it before purchasing. I've passed it around to half a dozen different people and none were impressed with it.
I downloaded Onx today for the free 7day trial and knew within the first 10 minutes it is far superior to Garmin software.
I've had garmin products in the past, but if this were my first Garmin item, I would have Never been a repeat customer.
Post up some coordinates of an area you are familiar with, I will get a screenshot of the Garmin satellite image and post them here for you to compare.
Great site here btw......