I'm thinking about buying a basic tonno cover/bed cover, possibly an Extang Black Max. Does anyone have any suggestions or experiences to share. I have a 99 F150 SB XLT 4x4.

one thing that i can say, dont get the self applied bed liner stuff. it sucks.

ok i can tell ya some.. black max great cover great company.. BUT dont live in winter states and make sure you dont have arthitus ... hope i spelled it correctly ... but long short is great cover but lots of work >> honestly .. the RT from extang less work more money ... but there is also others as in sportmaster.. my brother has one loves his.. his tilts..
and a host of other manufactures that make a soft inexpensive cover.. just go in a make em let ya play with the models you are looking at .. i bought what you have and it worked great in summer .. i dared not use it in the winter just because is harder to use in cold as weather...02 cents