It is cheap and it is everywhere, and there is real value in that — the retinoid you can actually buy and keep buying is the one that works.
It contains real retinol, not an ester, which puts it a rung above Olay's Retinol 24.
A fragrance-free version exists — buy that one.
It is a decent moisturizer in its own right.
Irritation is expected, not a sign it is "working." Redness, flaking and stinging in the first weeks are common with any real retinoid. Start twice a week and build up. If it is still angry after a few weeks, the dose is too high for you.