I have not experienced using lightning network and most casinos where I play is not integrating it as one of the payment method so I cant tell anything about it.
What I know is that lightning network users is still low in this gambling industry and most gamblers prefer to use altcoins if they want to avoid higher transaction fee.
I will not recommend it others ofc because I have no idea about it, I have no plan to use it as well for my gambling activity.
Maybe once it becomes more popular and once most casinos integrate it, I'll start to use it.