I originally started using the Redline for about 4 months. I then sold it for a V1 (3.872 latest version).
I have had the V1 for 3 months now.
V1 Pros
Mounts nicely on windshield and pretty sleek.
Arrows
Power cable
Light weight
Great range on ALL bands
Cons
Not enough modern functions and customizable options
Windshield mount
False alerts to K band and Ka band (when Ka guard off)
Feels "cheap" on construction
Redline Pros
Windshield suction cup
Very modern design and display
Many customizable options (tone, brightness, sounds, display, battery voltage, etc.)
Built with durable material
Great range on ALL bands
False alert technology
Cons
"Big" to mount on a windshield
False alerts to "POP"
Common positives
Great range on all bands. Both are high end radar detectors.
If I were to do it all over again, which one would I pick??
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...........Valentine One.
However, I really miss the Redline. (If I didn't already sell it, I would have kept it and not get the V1).
I do mostly highway long distance driving, and I feel a bit more confident with the Valentine V1.