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Agility 3 is fine. I used one before, no issues. Typical users will not see a huge difference between current and last gen mainstream SSDs like the Agility 3 vs high end SSDs. It's not like night and day like it is with HDDs to SSDs.
Best answer selected by helper800.
I've used the Agilty 3 for about a year with no issues. Seems good for the price.