My 5155 has been amazing. I bought the Mahindra branded grapple when I bought the tractor, along with the Mahindra branded box blade. The grapple is my most used implement and it's holding up well. It's not as robust as some of the aftermarket grapples, but it has been working fine for me. I have the W.R. Long third function kit, and aside from a few leaky quick disconnects, it works like a champ!
I'm coming up on 50 hours with mine, torn between doing the service myself, or taking it to my dealership. I know I could save $$$ doing it myself, just need to document everything.