Swapped a cheap rubbish double DIN eonon unit for a JVC Double DIN about 18 months ago for a very good price (just superseded model).
No comparison, JVC unit is so much better, it works all the time and is worth the extra outlay IMO.
Having looked on ebay & other online selling sites, the Eonons are quite expensive to buy given their rubbish quality and IMO they don't represent good value for money.
We've got an older JVC 7" CD/DVD HU with remote control in one of the other cars. Over 10 years old now and still going strong.