All you flat roof owners - Elastomeric or fibered roof coating?

[Chris Winterhalter]

I just purchased a 20 unit building and need to repair and coat the flat roof. I've used elastomeric coatings before and have been happy with the results. However I have a few roofers stating that fibered roof coatings are better for more distressed rubber roofs. I've gotten about 4 opinions and it is 50/50 with elastomeric and fibered roof coatings. Any landlords out there that have used these products with success for 5 or more years?