I have the EverFlex in 3/2, 5/4, and 7/5. I've had the 3/2 for over a year and a half, the 7/5 for almost a year, and the 5/4 for about 6 months. My local shop has, and has had, them all on clearance over that whole time, so they were $160, $180, and $200, respectively.
I have worn the 3/2 numerous times in water down to 71F and been comfortable. I have worn the 7/5 in water down to 51F and been comfortable.
I tried on suits from Cressi, Akona, and Waterproof before I bought the SP suits. The EverFlex suits had better seals and a better fit than the Cressi and Akona suits I tried. I think the Waterproof suits are actually a little nicer, but they were either a lot more money or had colors I didn't like (depending on which model we're talking about), so I chose the EverFlex every time. If I were choosing between a SP EverFlex and a WP and they were the same price and I like the color, I would go with a WP suit over the EverFlex. That said, if I were picking between those 2 and a Bare Reactive at the same price, I would think long and hard about the Bare. The only thing that would hold me back from the Bare is stuff I've heard and read about issues with the main zipper on the Reactive suits.
Note: The WP suits have a bigger variety of sizes than any other brand I've seen. Also, I agree with an earlier post. The EverFlex suits run small for the labeled size. I'm 6'1", 220# and my EverFlex suits are XXL and fit me perfectly. If you mail order a suit, be sure and check the manufacturer's size chart for that specific suit. I say that because I think I remember that WP has different size charts for some of their suits.