I like them. I rarely use them now. They actually helped kickstart my knife collecting. Sanrenmu, Ganzo, Enlan, etc were all affordable options. The more I got (cheaply) the more I wanted. I was able to hone my preferences where I wouldn't lose a lot of money on a bad buy. Then I started buying all of the popular models from various makers. Ka-Bar dozier. Ontario Utilitac. I then moved on to buy more kershaws (Blur, Leek, etc) and spydercos (tenacious, delica and dragonflies). I sold some of the earlier purchases to buy some of the later stuff. As my collection continued to grow, the spydercos were accompanied with Benchmades and nicer spydercos.
I still haves some sanrenmus in places that may get lost (the ZB4-T21 is always in the car). And I still have some other chinese starter knives, but the bulk of my collection consists of BM and Spyderco.
I see why some people get very upset by the copying of styles, but ultimately I ended up buying more nice knives that I ever would have had I not started with the inexpensive options out of China. Some of their models are a great value. Some others not so much.