Senghori Shells NR?

I have worn SSNR hair since Jan 2012 I had purchased a 1 and a 2 in 14 inch.  I managed to get 6 installs from this hair.  Everyone and I mean everyone thinks it is my own hair.  I absolutely love it.  I split the wefts and sealed them.  I just ordered some new hair this week 1b and 2 in 14 inch.  I was very, very concerned because of all of the reports of quality issues.  The 1b has a lot of grey hairs which I didn't notice until after I washed it.  How disappointing!  I prepped the hair (split the wefts and sealed it) so I will let you all know how it works after the install.