I own both the Buster and the Titan lines and am very happy with both. I also have one from their now-discontinued Stratus line. All of them have held up beautifully and I’ve yet to have an issue with waterproofing. My horses live outside 24/7 and California rain can be VERY heavy at times. I left my PE blankets on 24/7 for days at a time during the multiple atmospheric rivers we got last winter and never came out to a wet horse. I can’t say the same of the other blankets I’ve owned. I do NOT baby my blankets, either–they get hung up on fences to dry, tossed in the horse trailer if not being used during a brief dry spell, and may sit in said pile in the trailer for awhile before going to a blanket cleaner if we’re in between seasons.
The Buster line is a slightly lighter denier (840 vs 1680 on the Titan) but I haven’t noticed a substantial difference in their toughness. The orange blanket in the pictures above is one of their Busters, and knock wood, no tears or marks from rough housing even though the wearer sometimes gets munched on. The Buster line has a higher gusset in the shoulder, while the Titan is a more classic fit. I have not noticed a substantial preference from the horses between the Titan and Buster blankets. My purchasing decisions between the two have been based on the following: weight, neck type (I prefer detachable or high neck over integrated neck), color. I’ve been happy with all of them.