I have used the 5DS mouthpiece and it was very helpful, I basically used it till almost nothing left and certainly past the 80 hour replacement that is suggested, however this 6DS is exactly what I needed. I can tell that I have more stability for heavier lifting and I can definitely tell right away if I forget to put it in before my workout. I can tell something is lacking and then I realize the mouthpiece isn’t in but after I have it in the workout gets so much better. I highly recommend this product because I have used the other brands and those other brands are not comfortable and I would worry about breaking my teeth with theirs, but with 6DS that isn’t an issue at all.
Does what it said on the tin, also, there was a offer started the day after I ordered mine, and they honoured the offer for me without me even asking, thanks a million and also awesome product, works very well.