What are the best HU bot programs?

[Alex/Mugaaz]

I have a lot of free time at work and looking to learn HU play on a laptop. I've been using the Poki Poker academy and playing against Vexbott lately. I'm not a HU specialist or anything but it sure looks like he doesn't CR enough and I think makes a few questionable plays, but then again I'm really not qualified to rate his HU play. Thanks for any opinions or thoughts.