Hi There:
I don't think I've ever had a pleasant experience with the straight pushback option. It doesn't automatically stop at 100m, and when I pick the "stop here and complete pushback procedure" the tug lurches forward and suddenly speeds up before slowly, slowly, slowly ramping down...another 100+m after I asked it to stop. And that's if it stops at all. Sometimes it just keeps chugging away at this new fast speed.
Is this a unique experience to me? Is there a trick to using the straight pushback option?