I bought a Mate SE a few weeks ago and absolutely love it. It's fast, has great battery life and is a joy to use. The only caveat is that you have to be on a GSM network (AT&T or T-Mobile).
The Huawei Mate SE is an awesome phone. Its default EMUI skin kind of bugs, but a quick install of Nova Launcher (which I've now used on five straight phones) fixed that.