I was a long-time Nexus 5 user and upgraded to the Essential PH-1 last year and can't say I regret the decision. The 5 is still my favorite all-time phone given context, but the PH-1 is a pretty significant step up and has one of the prettiest form factors I've experienced. Some owners have experienced teething issues with the device, but it's been super smooth for me and I've been impressed with the speed of the updates (as you'd expect being an Andy Rubin company).