Did a little more research:
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FTP Builder - seems to be the best overall. Lots of Z1/Z2, more variety, doesn't seem like I will get bored, etc.
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Gran Fondo - I thought this one would be good but it seems like a high percentage of Z3, which doesn't seem as beneficial.
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Gravel Grinder - though the zone distribution doesn't seem bad, when you actually look at the workouts there is a lot of Z3+ efforts early on, and given my fitness and that I'm biking with one arm in the saddle, it doesn't seem to be good. It's supposed to simulate steep gravel climbs, etc.
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Back to Fitness - while the zone distribution doesn't seem bad, I'm not sure I need that much z4-z6 and the workouts seem a little gimmicky.
Pebble Pounder seemed too high on z3; planning on FTP Builder but also open to thoughts.
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