I have a 156R and an Engel 150 QT cooler. Both are 2010. It fits great width wise. One disadvantage is it sticks up kind of high: can be a knuckle buster at times as I run it right in front of me. But for a 150 QT with proper width, that's going to happen. I use NRS cool mount/strap and run it as close to the floor as possible.
The latches close fine, but could be a little tighter lid closure. I never had a problem with water getting in cooler, but seems like it could be tighter.
It looks like they have updated to a silicon gasket (mines rubber).
After writing this, I went to the website and they no longer offer the 150, but they do offer 123 QT. NRS used to sell them, not sure why they don't anymore?
Engel DeepBlue Coolers | FREE SHIPPING | 25 â€“ 320 Quart Sizes Available