I've seen them several times, but after Keith died. Kenny Jones is a good drummer, but never had the Keith vibe going...... Zak, on the other hand, is a pretty credible replacement for Keith. He's like Keith with a bit more technical expertise. I would like to have seen them with Zak while Ox was still alive.
FWIW, my kids LOVE The Who.......... My 7 year old walks around the house singing
Heaven and Hell 
...........
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'66 GTO convertible. 462, KRE 290 cfm Dports, SD "Old Faithful" hydraulic roller, CVM ported aluminum Tripower, TKO600, Moser 12 bolt
"I open up three deuces, I'm Never Coming Back!"