I reached the official 50 lbs goal at my WI this week. It took 18 weeks, so I'm still amazed at how quickly things are going.
When I started off at 261, I decided that I had no idea where I would want to end up so I don't have an official final goal. It could reasonably be anywhere from 30 more lbs to 60 or even 70 more (I don't see that really happening but I'd still be at a healthy weight for my height and not even close to underweight).
So while it very well could be the halfway point, I'll just stick with saying I am very excited to have hit 50 lbs down now. I still have clothing that is too small for me, so I know I must have been smaller than this at some point, but I honestly don't any memory of seeing lower numbers than this on the scale and I cannot wait to get to Onederland sometime in the next few weeks.