It does the job.
I bought this because the other Chinese cupping massage kit I bought didn't come with a connector tube even though I saw one in the product picture.  So I browsed online and eventually found this.  This is good to use for massage cupping kits especially if you're using it yourself like I am.  It helps get to those hard to reach places on your back and shoulders.  As far as the extra spare parts go, I haven't used those yet so I can't comment on how good those are.  But as I said, I only bought this because I needed a connector tube and they were hard for me to find online just to buy the connector tube itself so this was the best thing I could find for now.
Rating: 5 stars