Bupe isn't bad for when there's nothing else around and/or you're broke. It's cheap, relatively cheap, and the high's all right but is different from that of full agonists. In my experience, it's more of a floaty, tramadol-like high with that sort of instant anti-depressant feeling or effect.
In other words, if there are bags to be copped or oxys to be eaten, then I'm going that route. If there's nothing around or I don't have the money, then I'll just pick up some bupe and call it a day.