Yes we installed one in a customers truck. He has used it for a full season now and it seems to work well. Did a tonneu cover over the bed with RTT and bed slide for easy access to the full length of the bed. Its actually not a very heavy unit and can hold a lot of weight. Its bolted many places and seem to spread weight evenly and when pulled all the way out its still not so far out as to stress the front mounts.
I like it a lot.
We used the bed slide in our USFS trucks for fire and they are nice. Makes getting heavy crap out of the bed way easier.
Im not a fan of the plastic/composite bed but its definatly strong enough for a bedslide. The dealer is always scared of things they dont understand or can warranty easily. Dont worry its works well.