Topping D50 vs the "Big Boys"

https://www.amazon.com/TOPPING-D50-HIFI-ES9038Q2M2-DAC/dp/B006GJ2SK4/ref=sr_1_5?keywords=topping+d50&qid=1565937849&s=gateway&sr=8-5

https://www.amazon.com/Dilvpoetry-TOPPING-Decoding-ES9038Q2M-Amplifier/dp/B07BGTHF79/ref=sr_1_4?keywords=topping+d50&qid=1565937849&s=gateway&sr=8-4

https://www.amazon.com/TOPPING-ES9038Q2M2-DSD512-768KHz-Decoder/dp/B07BQTFWW1/ref=sr_1_3?keywords=topping+d50&qid=1565937849&s=gateway&sr=8-3

grannyring - don't know what you are reading about " Many units just don’t work or work properly.  DOA or after a week or so." 
Amazon compilation summary from  2 smaller groups of review : 

Impressive - 5 stars

computer audio bliss - 5 stars

Great DAC for a PC based audio system - 5 stars

Took my listening to a different level - 5 stars

Really, really clean audio - 5 stars

I love this little thing. - 5 stars

Blew my mind - 5 stars

Five Stars - - 5 stars

very digital- flare esc sound - 1 star

Hit's above it's weight - 5 stars

BEST DAC I HAVE HEARD UNDER 1200 DOLLARS...Schitt included - 5 stars

Fantastic and versatile DAC 5 stars

Sounds great - 4 stars

Great Value Dac 5 stars

Distorted broken sound 1 star

Small, runs cool, pristine, perfect for my needs. 5 stars

Excellent sound quality 5 stars

USB works with PC, but no joy with iOS - 3 stars

Dead on Arrival Hoping I can send back for a refund! 1 star

Another group of reviews - 

****95 reviews 4 out of 5 star total average***

Yes I own one and think its a steal......WOW biased against it??

Virtually all the bad 13 reviews you reference are from 2013 - 2107 with but 1 in 2018.....I had forgotten but researched it again the D%) as currently sold was released in March of 2018.....thus all the 2013, 2014 201 etc reviews that bother you are NOT relevant to this current unit....have a good day anyway.....  http://www.tpdz.net/news_detail/newsId=79.html

Typo above meant D50 - another review just after release in March 2018 -  https://www.audiosciencereview.com/forum/index.php?threads/review-and-measurements-of-topping-d50-dac.2403/ - again whatever Amazon was calling a D50 back then was not the current unit - also 2 of the bad reviews are referencing SMSL Model 8 so they have the wrong unit completely...misposted

Geee - you falsely dump on a product - greatly exaggerate the "defect" rate (on some other unknown units) and just cry uncle????  Fantastic.....Luv the logic