We stopped at Bosco's on our way home from Raetihi over Easter. The cafe was very very busy with other people heading home. Despite this we received excellent service and our food and drinks came out very quickly. I had a flat white as good as I have had at any city cafe.
If you are heading down SH3 I recommend calling in, these guys are an asset to Te Kuiti and one of the best cafes in NZ.