Stock price when the opinion was issued
Warning flags. US-based product. Never trust yield. Covered calls on this product don't get the favourable capital gains treatment. It might be OK in an RRSP, RRIF, or RESP, but not in a TFSA. You're not hitting the sweet spot of favourable tax treatment.
Doesn't like writing covered calls on stuff that's very volatile, such as NASDAQ, gold, or oils.
It is OK for income strategies. It has returned 26 1/2% over the past year but owning the actual Nasdaq 100 would have returned 43%. It is better to buy the actual stocks if you don't need the income.