I've been running two Filstar Rena XP3's on my 110 gal. tank with not one single problem, not one! One has been running for over 5 years and I added another one over 2 years ago and between the both of them, I have not had one single problem at all. I think that's pretty good.
I've never change the sponges in either. Just rinse and reuse. Same with bio media. But I do change the Micro pad when I use it, at this time I don't have the micro pad in either filter. My water is super clear.
But as always we never stop trying things on our tanks so I think I'm going to try a Fluval FX5 sometime soon. I like it's advertised flow rate.