What are the pros and cons of baby led weaning?

It is a frustrating stage for some parents. It is a progressive stage for infants to start on semi solids. For me, it is a great stage where my baby learns strong oral motor skill; chewing, swallowing, spitting etc. they r at exploration stage. However, it might also mean a hair pulling moment for parents as they start to be careful with food allergens for their lo. Any food can be a trigger. Other than that, parents have to get used to mess in case bb spit out, spill, vomit out food. Key word- don't give up trying during weaning period.