The Oster Fast Feed clippers are well-built, super quiet, and MADE IN THE U.S.A. The ONLY option missing was this Andis Ceramic Edge Course Cutter, to replace the stock Cutter. It took roughly 10 minutes to have everything set up (5 mins remove and replace/5 mins to set the Zero Gap and properly align the blades). I'm a newbie, and I wanted to take my time getting everything set up, if you have experience,n or want to speed the process, you may not need the same amount of time. The Andis Ceramic Edge is VERY sharp! I cut my own hair, simple, almost-skin bald, military-style. The Oster and this new cutter are PERFECT! MY clippers got lower to my scalp; perfect length. The butter-smooth action, ultra-quiet Oster performed flawlessly! Make sure to take your time to set the Zero Gap alignment, if you don't know how to set it, check out YouTube, it's EASY. Asides from the nice contrast look, nice lowered hair length, I took about 20 minutes cutting my hair, I felt ZERO heat from the clippers! I HIGHLY RECOMMEND this Andis Course Ceramic Cutter! Take care to: NOT drop the blade on a hard surface, although it's SUPER SHARP, it's still ceramic, and could get damaged if dropped. Align the blades, oil them up, and enjoy the Oster and Andis combination! If you attempt to Zero Gap your Oster Fast Feed clippers without the Andis Course Ceramic Cutter, it won't be a true Zero Gap. The Andis' teeth are longer than the stock Oster's, which will allow the true Zero Gap.