So if there are no problems with the delivery people in your area, and nothing usually goes missing, there’s not much against a parcel box (except the price). I would just distance myself from the idea that they will still ring the doorbell. I assume everything that fits into the box will end up in there. If you’re not home during the day on weekdays anyway, the advantages probably outweigh the disadvantages.
Personally, I wouldn’t do it, but that’s because I can usually open the door for the delivery person, and because I have had bad experiences in the past with dishonest parcel deliverers.
Even if your delivery people are fine at the moment, and problems should arise at some point, you could always take the thing down again.