I've had an ENR for a little while now. It replaced a Banshee Spitfire. I bought it frame only and switched out the frames, with the same CC DB Inline. It was really easy to build up and the internal cable routing was much easier than I was expecting. Zero cable ties on this bike (except for the mud guard on the fork...)
I like it a lot - I don't feel I have given up any pedalling efficiency at all, even going from a 140mm frame to the 160mm ENR. In fact, I think the ENR feels more responsive and efficient than the Spitfire, and it has none of the pedal kickback you'd get with the Spitfire.
It feels like it sits quite high in its travel when pedalling uphill, rather than squatting and having the seat angle slacken and the bottom bracket drop. I think that's a function of the firm midstroke plus the antisquat staying consistent throughout the travel, rather than dropping off the deeper you get.
I found that the Spitfire needed a bit of low speed compression damping to provide chassis support, whereas I'm wide open on the ENR and don't feel the need to add any - I think that's the mistroke support again.
In fast, rough stuff it feels amazing, and on more mellow trails it doesn't feel too overbiked. I have a 2 degree angelset on mine now and definitely prefer it to the stock head angle.
It took me a while to get the spring rate set up right. The last bit of the travel is very linear and bottoms easily. I ended up putting all ten rows of volume reducers into the DB Inline and it's pretty good now (I also tried four and seven rows, neither of which were enough). Maybe I could pull out a couple of rows and add some high speed compression damping, but the Inline needs another rebuild so I have decided to replace it with a Monarch Plus.