Strengths:-The case is LIGHT, durable and COMPACT.-comes with blanket for viola and shoulder straps.- provides mild suspension for body of viola-The handle is made of 2 straps sewn onto the side of the case with a comfy grip in the middle. Because the handle is SEWN on, rather than SCREWED on, the handle can handle MUCH MORE stress over a LONGer period of time.- my 15.5" viola case fits snugly and will not shake while in this case.- materials feel sturdy (case frame, grip, cover, zipper)Issues:- Case is top heavy. When empty and opened, the case will tip over slightly. Tipping over will not harm the instrument; it is just an annoyance- no place built in the case to hold the shoulder rest. Although, the book compartment of the case is big enough to hold the shoulder rest along with a few books.- this case is a TIGHT fit for the 15.5" violas. Purcase the 16-16.5" case if you have a wide 15.5" viola or anything 15.75" and larger. Additionally, any distorting force (such as somebody foolishly sitting on the case) will not be buffered by empty air within the case. Rather, the viola itself will immediately begin feeling the applied force.- bows can still slide back and forth during transportation.I am very satisfied with the purchase! By the materials and construction of this case, I can tell it will last me a solid length of time! (I will edit this review if it doesn't). If the $50 Protec Max case is this good, one can only imagine what the $200 version has to offer. Hats off to Pro Tec!