I liked the 18 min halves this past season in MN as well. Although most games had a decent and continuous flow to them, there was the one or two games where I looked up and we were in the bonus with 10 minutes left (but maybe that's my own fault
)
MN also adopted the courtside replays during the televised games of the state tournaments this year...and it was used in the girls tourney to put time back on at the end of the game. The only "reviewable situations" were to count or cancel a basket near the of each half, and to add time to the clock "near the end of the game")