I bought RH - 3019 first, but I use it as well as that I used before as well as there. Since the price is also about half, we also contributed to cost reductions. I personally think that I would like to purchase it next time as well.
There is no problem with the feeling of use equivalent to conventional use items (for nominal diameter 19 more than that). The price is less than half price. Personally I would like to continue purchasing.