After watching Direwolf's videos on teleporters and this mod, I decided to give it a try today. Built a pad in my base, built the personal teleporter, linked them, and rode the long rail out to a vast abandoned mine complex about 1100m away. Teleported home with no problem! But it still means a 2 minute railcart ride to get there... so I built another pad there and linked it to the first. Tried my personal teleporter... and wound up in the Void. Had to revert to a previous save - which meant all the work I've done since last night was LOST (it was that, or all my expensive gear!)
So I suppose you can clearly guess what my vote was. I'm reluctant to use the mod until that's fixed. I know it seems "cool" and somehow makes sci-fi sense, but there's honestly no reason the teleporter should even work without designated target data - it should be no different than the in-game ones in that regard.
I am eagerly awaiting the fix. Those of you who feel it's "fun" to be sent someplace where you lose everything with no hope of reclaiming it, feel free to go to the Nether and jump in lava, OK?