I like to rabbit when possible. It gives me info on what card(s) were left in the deck. Helps me (occasionally) determine if an opponent was bluffing. I'm not using it to determine if I woulda caught my straight or flush, but it helps me with opponent ranges.
I think that when you start playing poker and do it with friends you can show your hands and analyze the cards on the table to learn.
Otherwise, in a real game I do not need to see it, actually it may even blur my perception.
I see a single card as a range or a probability for example
a card's suit can be
[ or a little less that 25% if there are already drawn some cards of that suit]
then the analysis of play goes like
what would happened if the card suit is spades
what would happened if the card suit is clubs
what would happened if the card suit is hearts
what would happened if the card suit is diamonds
But if I see that the covered card is spades, and maybe in another hand I see spades
again, I would tend to believe that the spades probability is bigger than 1/4.
Similar with the opponent hands.
I use them from time to time. Mostly if I'm wondering if I would've hit my draw or if I know I got my opponent to fold a better hand or if I know that they were betting on a draw. I see it as an opportunity to put opponents on tilt. I know when I first started playing I used to get so upset when the card run out was exactly what I needed and the pot got rather large right after I folded, then watched someone win with one pair or something like that. I do not use it for my own benefit because I will fold flopped straights, flushes, and boats many many more times in my poker career and I will not allow this to frustrate me.