External Bath Strainer - drains much faster than internal ones 

So I had this bath tub strainer that went on the inside the sink. For awhile I thought my piping was messed up because the sink drained so slowly. Ive used that old strainer for years and even with regular cleaning I didnt realize that was the reason my bath tub drained extremely slow. It was only by accident I didnt put it back in and took a shower and noticed the water was draining normally.
After seeing that, I went on the internet to try out an external strainer just so I can get one that doesnt slow down the drain too much.
Ended up getting this one:
www.amazon.com/OXO-Silicone-P...
Now my tub drains as if theres no obstruction. It does have an issue of moving during a shower so its not perfect. This video is just a log of my experience using this strainer.