Well ... I liked both Onegai Teacher and Onegai Twins, to be honest.
I totally did not expect a similar set of plot devices and what not - but I am glad of them, as I liked the early two "variations" I guess.
I kinda doubt it will be an earth-shattering series, but I think I am going to like it. 7.5/10 vote from me....
For now it's going on my "to follow" list.