I can give to the Montana 600 very good practical experience. It covers all areas of application. Whether for cycling, car, trekking or for geocaching it is a Alroundmodell. Although it is bigger and heavier than other models but it still begs the question why you need a GPS. As for the use in the car, I can not say anything yet. The price of the car holder (proud 88) with voice output is not yet loose enough!
Advantage: large display, very good presentation, ease of use, high battery performance, possible battery use, waterproof, large device memory.
Disadvantage: high price (equipment, accessories, cards), no attachment clip.