Succulent about to Flower?

I'm no fan of cacti and succulents, but we have a large one on our front porch, left by our landlady. I water it occasionally, and repotted it last Autumn when the previous pot actually broke due to the excess of roots. Yesterday I noticed that it has a long stem with buds at the top, so I'm now expecting it to flower any day. I think this is the first time since we came here nearly eight years ago... perhaps due to my having repotted it!