Soak it for warm water in an hour to get rid of the excess indigo.
As far as plusses or minuses, the affect will be minimal. Honestly, unless you're super hardcore about getting high contrast fades, it won't matter.
- Removes excess indigo (it will still rub off on stuff, but not quite as much)
- Allows for shrinkage (it will be minimal)
- Lose some starch and crispness from the denim
- Retains crispness longer -- creases can set in faster and potentially lead to higher contrast fades, but this is a debatable point.
Honestly, I always wear it a couple times before soaking, but soak within the first week. There's really no method to the madness, just what I do because I'm weird.
As far as washing is concerned, again it depends. I would suggest giving a first wash after 3-6 months of wear... or if it gets dirty. After that, i would wash infrequently -- no more than once a month... or if it gets dirty. The more frequently you wash, the less high contrast your fades will be. That being said, even if you wash regularly, your jeans will still fade. There's really no way to screw this up.
Congrats on considering raw denim, it's a ton of fun. Just try not to over-analyze it, even if it is a bit more expensive than what you're used to.
Thank you for your helpful input. I am going to order the skinny and the tapered and check the fit. Just measured the waist on one of my jeans and it is 32. Looking at the measurements on the Unbranded website, the 32 equivalent of UB101 and UB201 are tag sizes 31 and 30, respectively. I have no prior experience with raw denim, so I am not sure how much they will shrink/stretch.
Should I go with tag sizes 31 and 30 or go up/down?