Definitely my favorite DLC so far. Weapon Repair Kits have gotten even easier to get, what with being able to "manufacture" all the ingredients but the wrench. Scrap Metal & Duct Tape from clipboards (Book Chute). Wonderglue from coffee mugs (Muggy), Scrap Electronics from appliances (Toaster). Really awesome that you can get a 1 lb. Duct Tape and a 1 lb. Scrap Metal from a 1 lb. clipboard! woot! :)
Also, OWB has made it immensely easier to sell those 37 gold bars if you were able to get those out of Dead Money. Use the Big Mountain Transportalponder and take the 37 gold bars to the Sink and sell them there.
Also my (now) favorite weapon is Christine's COS silencer rifle. I use this over the Anti-materiel rifle.