I’ve done enough of them. These are often easier than a lot of other locations. Soffit is also a place where leaving them to die out is relatively low risk.
The first questions I ask are 1) when did they move in? 2) were there ever bees there before? and 3) How high up is it?
The ideal timing for a “soffit removal” is within 1-2 days of the swarm’s arrival. You’re basically just removing soffit to collect a swarm.
The worst timing is 3-6 weeks after a swarm has moved in. The combs are very soft and delicate, and the more honey they’ve stored the worse it is - combs can collapse under the weight of the honey as you’re trying to remove them.
If there were bees there previously, the combs will be a lot tougher, but there will usually be a lot more of it and more time will be required.
Overall, I greatly prefer most soffit removals over just about any wall extraction as long as it’s not more than about 12’ off the ground.