I like mine. 3str and 1% haste is pretty solid for a DD build. It's definitely limited to a DD option because you're better off tanking with a higher def shield with defensive boots like Iron Ram's 3str/vit/atk/eva.
As far as comparing DD shields, it depends on how much haste you have. With spell and swift, that would put you at 20%, which would start giving larger returns on haste (1.5-2%ish, although 50%+ haste 1% gives about 5% increase in damage). The only alternative that comes to mind is Viking at 12 attack, so the question is whether or not a 75% chance up fstr and 1% haste can outweigh 10.5 attack, which on generally you'll be hitting a couple points higher with Viking (1-3%ish increase in damage), so increase will be very close between the two if sentinel ups fstr.
Blitz ring is fail because it's only 1% haste competing for a slot with a lot of strong options (however 55%+ haste 1% can win out, though many people using it have like 20%). So for rings you could be have 7acc or 5str or 5dex or 4atk/acc.
Sentinel shield is basically competing against Viking or Iron Ram, which is a lot easier to compute. If blitz ring had 3 str on it, it would be a hell of a lot more expensive and common (think Unicorn Boots).
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80 Pup Brd, 75 War Rdm Drg Sam Mnk Pld Bst Thf Whm Nin Smn Blm Rng, 72 Drk, 63 Cor, 50 Blu, 40 Dnc Sch