Reddit reviews Arcade Legends Sega Genesis 2

For those who don't know what the mini Genesis is - much like myself yesterday before I spotted it at a thrift store - it is a Radica Arcade Legends Sega Genesis Volume II. It takes 4 AA batteries and has the following games:

• Sonic the Hedgehog 2
  
• The Ooze
  
• Gain Ground
  
• Ecco the Dolphin
  
• Columns
  
• Alex Kidd in the Enchanted Castle
  
  Here's a screenshot of the menu. Gain Ground and Columns are two of my all-time favorite Genesis games - I was a bit floored when I found out that this funky mini Genesis actually had Gain Ground on it.
  
  These little bastards fetch a pretty penny on Amazon and eBay - I got father and son, if you will, for $8. Of course, the battery cover is missing - oh well, it works just fine.
  
  The rest of yesterday's haul includes:
  
  PS1 (7501) w/hookups, 2 controllers, memory card and Croc: Legend of the Gobbos ($10)
  
  5-screw Top Gun and Tennis + 32X Mortal Kombat II ($10)

Do a search for Atari plug n play and Megadrive/Genesis plug n play. Should get a few results

Eg

Sega Megadrive Volume 2 - Plug n Play TV Games https://www.amazon.co.uk/dp/B00066LG60/ref=cm_sw_r_other_apa_a-GJyb59YXMQ3

The one he has been playing lately was this

I have not heard him complaining about input lag with it. Are all new "consoles" emulator based with low processing power an lots of input lag? Even those with a cartridge bay to play original games?