I only use cycle lanes if:
1. It is going exactly where I want to go anyway.
2. It has no more junctions added to it than the road route. (side roads etc, i.e. priority is still with me)
3. It isn't full of parked cars
4. It isn't painted too close to parked cars
5. It isn't full of manholes/huge holes/broken glass/dog eggs/clueless pedestrians/familys on bikes
6. It isn't constructed in the manner of a 'cycle-lane facilty-of-the-month' horror story.
7. It isn't placed in 'turn-left without looking' territory.
8. It is no more than 10% longer than the road route, and dosn't include 5000ft extra climb over every and any possible minor obstruction.
9. The surface is tarmaced and in good condition (no moss, no cavernous holes, lot like riding down washboard).
10. You can carry good speed (i.e. isn't full of 90degree corners, blind approaches, diving off through back roads through housing estates).
11. Not marked out with litres of white paint, which, when damp, turns them into an ice-skaing rink.
The result is that I rarely use 'cycle lanes'.
Advance stop lines are ace though. I used to use the Bath-Bristol cycle path to commute to work on a lot too.