I and my family have owned or own the following Samsung products:
Galaxy S2 (Wow, such a huge screen - back then)
Galaxy Nexus (lovely curved display!)
2 x Note 4 (Sold one, missed it, so got another)
Large fridge (LED fridge light, oooh!)
Touch controlled halogen kitchen hob (Easy to clean, superb touch panel UX)
EX2F camera (Superb images and built like a tank)
Small wireless laser printer (Well designed, fast and reliable)
Just bought a Galaxy S7 (All good so far!)
For the record, I am typing this on a Mac mini and own an iPad Pro 9.7, so not a fan boi of any specific brand, just buy what works, and my number one prerequisite is reliability/stability, followed by speed followed by versatility, and then if it's portable, battery life.
My Note 4s both suffered proximity sensor failure soon after purchasing new, and on both occasions, Carphone Warehouse & Samsung repaired them under warranty, no questions answered. A known issue perhaps?
Other than that, I have found Samsung gear to be outstanding, and more reliable and innovative in some ways than their competitors, including Apple. (Example: Swipe to send a text on Touchwhiz is invaluable.)
From both a consumer and professional level (I interact with Samsung staff and know former employees), the company DOES have some issues when it comes to customer relations, but like Sony and others, this is because they are an Asian company and the pride and national history means for a very different culture. Although Apple are superb when you have an issue and walk into a (real) Apple Store, they are just as arrogant when you phone their support lines. (I know, I have done it a few times, and didn't like the way they tried to deny there was a well known problem, such as MacBook wake/sleep issues or other. And they rip you off support wise after only 90 days of ownership!)
Samsung gear is on the whole built very well, second only to Apple, although my new S7 is very nice and in my opinion superior to even the iPhone 7 from all aspects, from design to features to quality.
I am willing to bet that the majority of this 30% are paranoid Americans or naive consumers elsewhere who have not read into the statistics or waited until the investigation by both Samsung and the authorities is complete and public.
It is company pride and a cultural issue which is why Samsung acted the way they did, not with an intent to do harm. They know full well that just one fatality or worse would mean massive lawsuits and way more harm to the company than even the current fiasco.
I'm keeping my S7 until the 'Note 8' appears, and am also very interested in the new leaked Samsung Chromebook with a stylus, no doubt Samsung will have a few spare S-Pens now! ;)
Anyway, uninformed paranoia or naivety is a force for harm, making things worse than they need be.
Oh, and if I could get my hands on a Note 7 (am a stylus man, frees the creative brain!), I would happily buy one and keep it on me. Statistics say I am more likely to be hit by a bus whilst texting and walking than it exploding in my pocket...