Thanks! So I flashed it- here's a couple of observations for those using the developer edition.
1. In the phone info menu, there is no Lte/WCDMA/GSM auto option. There is a LTE/GSM option as well as a stand alone WCDMA option, but not both together. This means is the phone loses LTE it falls back to Edge and to get HSPA+ you have to go in and manually set it to WCDMA. I'm trying to decide if this is a deal breaker of not. I may just set it to WCDMA permanently, T Mo's HSPA + is good enough where I live. It'll probably do the battery better as well.
2. The phone will not connect to HTC sync. It keeps saying that the phone is locked. It's not.
3. Both Android File Transfer and the storage screen show 25 Gigs of available space. The storage screen does show a total of 50 some off gigs, but shows 25 as available. I'm assuming this is because the googly play edition is 32 gigs. I'm transferring all of my music over now. I'm assuming that once I fill the storage so that less than 25 gigs is available then it will be accurate.
4. Much better TMo lte signal than the stock rom, although equally fast.
I'm going to try it for a couple of days and see how things go,