My primary issue with the AVS system is that it is a front-loader. Anyone who knows retro gaming knows that top-loading is the most long-lasting and easy method of playing NES games. Get the NESv2 system (top loader version) like James Rolfe has shown in his AVGN videos. He plays NES games to review them and even he doesn't want to mess with front loaders anymore. ;)
The issue with front loaders has to do with the way the pins will 'bend' and 'warp' over time due to gravity and wear/tear and how some carts were created back in the day. The Famicom was a top-loader but the NES in US/EU regions was a front-loader for some reason. I guess they wanted to emulate the 'VCR' style front-loading system but didn't take into account how VCRs had a lot of internal moving parts to load/unload the VCR cassette tape.
We've moved on from the 80s/90s so top-loading NES clones are the way to go.