Most of the time, if it looks too good to be true, it is. But once in awhile it's not and you have to be on your toes since a conversion/reversal opportunity is fleeting.
Yes, you have to be pretty nimble to take advantage of a conversion. I use IB for trading. They have a combo order for conversions and reversals. If your platform doesn't offer that then you have to leg in and that's tricky, particularly in a strategy where there's so little room for error. It's not like you can buy 20 puts and then expect to short 20 calls and then buy 2,000 shares and expect all prices to hold as you execute each leg. If your platform offers synthetic put and call combos then you can do it in 2 legs instead of three.
The dividend would be an issue if you were shorting the stock in a reversal. Noobs often look at the option premiums of a pending dividend reversal and think they've found free money, not realizing that they're going to pay out the div if holding on the ex-div date.
Last of all, make sure you understand "Pin Risk" if you're going to dabble in these.