The tomtom ONE I bought for work was useful... for the first month or so. It kept losing connection and would not be able to find a satellite signal for hours or even days. It would put my car in fields, rivers, anywhere apart from the road, and as such it was unable to navigate at all. I was on my way to take it back, but was leaving from an office in an unfamiliar area to a branch of dixons (the store name) I had never been to. I used the tomtom to get there but a mile away it started telling me i was driving through the building adjacent to... read full review »