It's a great Dumble-like pedal. I didn't care for the lowend on the original, but the TLE-mod from what I've gathered has fixed this.
Whether it's worth the money or not is all up to you. It looks like there are a few different pedals on the horizon worth checking out if you want smooth lead tones with lots of sustain - Andy Fuchs of course will be releasing his Plush Drive that sounds really great from the clips I've heard. The Zendrive is Dumble-ish, but doesn't have a lot of gain - so that may be a shortcoming based on your setup.
I've played all the pedals in this vein, played real Dumbles and plenty of clones....the Ethos is the closest out there imo, both in tone, and feel/response. My buddy Blueser sent me his to check out and I did not want to send it back.
I've got my own on order, when it arrives I'll send it to you to check out if you like.
I've got both the Ethos with the low end mod, and a Zendrive. I play mainly Stratocasters with low to medium output pickups. I'm playing through a Tone King Meteor II set sparkly clean, or a Princeton Reverb. I had the Zen for almost two years before I got the Ethos.
I like the Ethos much more for the sounds I most like. To me, and with my gear, the Ethos sounds much more amp-like. I find the Ethos even more sensitive to picking dynamics than the Zen, and as I've said before, I've dialed the Zen to within an inch of it's life and it always has a square wave kind of buzz riding on the notes. I'll probably catch flak for that because everyone claims the Zen is so smooth. Not compared to the Ethos. The Ethos can be dialed to sound harmonically rich and urgent, but without the buzz. Here's some more blasphemy, I like the Ethos overdrive significantly more than the Fuchs ODS 30 SLX I had for two years. To each, his own, but the Ethos is the most satisfying of that kind of tone tool that I've played.