Is this Acer monitor good enough

What is or isn't "good enough" depends on your own expectations - the crappiest display on the market is still good enough for people who want the cheapest display they can possibly get no matter what quality they may have to sacrifice.

Almost anything on the market has to be "good enough" at least for some people, otherwise the companies making them would all go out of business due to heaps of capital stuck in depreciating unsold stock and unrecoverable tooling costs for each failed model.

Your best option may be to visit Staples, Best Buy and other B&M stores to have a look at what they have and pick from those you've been able to see as demos in person.
 
Sorry for lack of details.
'Good enough' i meant components, colors, visual quality, brghtness, contrast etc ...
Does it include some good features for gaming, is this model dangerous to buy because its defective ...