I have shot the Montecs for the last 5 seasons.
From an accuracy and effictiveness standpoint I think they are right up there near the top of the list.
When I was getting ready for my caribou hunt I regularly shot them out to 90 yards and was able to consistently hit a caribou sized kill zone at that distance.

This year I went to the slick tricks and have been very impressed. There are a couple of thinks that I like about the tricks that have made them my new "go to" head.
1) Sharp like you wouldn't believe: Not that you can't make the Montecs sharp, but it took some work.
2) If you nick a blade, you can buy a replacement set for about $10. Nick a blade on a Montec and it has just become a practice head.
3) Cost: When I started shooting Montecs they were pricey (~$27 / 3pk). This year they are $35/3pk. While they are a great head, they seem to have surpassed my price vs. value point.

I would recomend the slick tricks as a more than adequate substitute.