Well, all I can say is that it's a nearly perfect plane for me. I started 3D-ing this season and I'm still working on the basic skills. The Sabre X has an absolutely rock solid harrier at virtually any alpha, so it's the perfect plane for me to perfect the basic stuff, such as low harrier figure 8s and hovers. As for the high energy stuff, I've gotten it to do blenders, flat spins and KE spin. The KE spin is kind of funny, since it's in slow motion.
I'm running the Emax GT2826/05, which is a cheap but decent motor. However, I'm about to upgrade to a Motrolfly 3615/750kv to get a little bit more power to the prop and a little less heat. Kudos to the Emax, though. It performs pretty nice, considering that it costs about a third of what the Motrolfly costs. ValueHobby seems to have discontinued the Emax motor, but HeadsUpRC.com still carries it.
If you are getting this plane, do NOT go with the setup recommended on ValueHobby's site! The motor is reportedly too weak and the PowerHD servos are junk! I ripped mine out and put in Hitec HS82MGs I had sitting around. They are probably at the low end of what's acceptable for this airframe, but they're doing fine so far. If I didn't already have them, I'd probably gone for HS85MGs.
It would be nice to hear what someone with a little more experience has to say about it. But if you are like me and you've just gotten into 3D and you want to translate the skills you've gained on foamies to a "real" plane, I'd say you can't go wrong with this airframe. Especially since it sells for $119, and... are you ready for this?... VH carries spare parts for it!!!