We enjoyed the overall zip-line activity. Our guides were good, particularly Brittany and made our zip tour fun, even in a downpour that rolled in for most of the event. I only have only other zipline experience to compare with (Arbortrek in Vermont) and the zip lines were fairly similar in terms of number, length, and speed.
We chose NorthShore based on availability and pricing to fit in with other planned activities on the day we went (i.e. last minute decision). Overall price was very good in comparison to other options although some other outfits offered more runs in their tours. I didn't do the math but I suspect even at a $/line NorthShore would come out about the most affordable.
Where I was hoping for more was in the environment. The layout that makes is easy to complete the circuit by being very compact also ends up making the feel of the tour fairly mundane. If you prioritize not wanting to have to hike/walk or take a van ride to get to the start/finish, then NorthShore is fantastic for that.
Another nice plus was the array of rain jackets available to borrow, which our group definitely needed and were thankful to have.
My biggest "con" for NorthShore in comparison to my prior experience is that while they take photos, they are only available for purchase. Yes this is stated on the website (along with comments on if you want to bring your own camera) but the other place I've been posts them to social media so you can share/download. It's a picky thing I know, but most people don't carry a point and shoot camera anymore. I would have happily paid an extra $5pp and they still would have been one of the least expensive options and I suspect they'd make more money in the end given I don't think that many members of our tour paid for the photos.
My last comment - apologies to our guides that when I went to grab my wallet fro the car after the tour, I couldn't find it and therefore couldn't tip them as they deserved!
So, definitely a solid outfit and a good time but plan ahead and bring your own point and shoot camera.