You shouldn`t experience premature / excessive shedding due to weakened knots because she says they come unbleached...it`s possible you may get shedding due to hair breaking /snapping --this is usually caused by dryness..anything you can do to combat dryness is good ... don`t shampoo hair too often, mist the hair with water daily , and use a daily leave-in conditioner on the damp hair. Cotton pillow -slips can snag hairs and cause them to break off as you move while sleeping ...use satin or silk ones if possible.
It sounds like the ` shine` you describe , may be achieved by the use of finishing-products containing silicons ..... also, you should ` dictate` the style which you feel looks good on you ..after all, you`re the person who`ll be walking around wearing it ! Don`t be afraid to ` speak up` in a polite way of course....... what colour hair will you be wearing ? You should have a good ` look` at how they do the bonding-on etc. ... and then consider making a template and ordering your ` own` system.....it`s not as difficult as you may imagine .....and you can ` dictate` the specifications which you feel will give you a system which is ` you` ! Best of luck with it .. I know how anxious you`re feeling ..it`s normal /natural .... hope it all goes smoothly for you and the knots issue is not going to be a biggie !