Like the VIC-20 Ultimate Expander, the Behr-Bonz cart is very well built.  No sloppy soldering, etc.  Eslapion always has done a good job building quality stuff, and this latest offering is no exception.

The Behr-Bonz Multicart is designed to fit perfectly into a VIC cartridge case.  Common VIC carts (Avenger, Radar Rat Race, etc.) can be had for next to nothing... you probably already have a spare one or two anyway.  I'm planning to put my Behr-Bonz cart into such a case soon-- I'll update the site with a few pictures when I do.

Playing the games is as simple as making your selection (keyboard or joystick are supported) from the 'boot' menu.  The only exception is the Scott Adams series of text adventure games.  Like with the original cartridge, Behr-Bonz users must type SYS 32592 to begin playing.

The Behr-Bonz Multicart sells for a reasonable $30 + $10 Shipping. 

BEHR-BONZ MULTICART GAME LIST

AE
Aggressor
Alien Blitz
Amok!
arachnoid
Artillery Duel
Astroblitz
Atlantis
Attack of the Mutant Camels
Avenger
Bandits
Battlezone
Black Hole
Buck Rogers: Planet of Zoom
Capture the Flag
Centipede
Choplifter
Cloudburst
Clowns pour Joystick
Clowns pour paddle
Computer War
Congo Bongo
Cosmic Cruncher
Cosmic Jailbreak
Creepy Corridors
Crossfire
Cyclon
Defender
DemonAttack
Dig Dug
Donkey Kong
Dragonfire
Final Orbit + Bumper Bash
Frogger
FROGMAN.PRG
Galaxian
Garden Wars
Gorf
Gridrunner
IFR (Flight Simulator)
In the chips
Jawbreaker II
Jelly Monsters (clone of Pacman)
Jungle Hunt
Jupiter Lander
KEYQUEST
Krazy Antics
Lazerzone
Lode Runner
Lunar Leeper
Maze
Medieval Joust
Miner 2049'er
Mobile Attack
Mole Attack
Money Wars
Monster Maze
Moon Patrol
Mosquito Infestation
Motocross Racer
Mountain King
Ms Pacman
Mutant Herd
Omega Race
Outworld
Pac-Man (original)
Paratrooper
Pharaoh's Curse
Pinball
Pipes
Poker
Polaris
Pole Position
Predator
Princess and Frog
Protector
Q-Bert
Radar Rat Race
Raid on Fort Knox
Rally-X
Rat Hotel
Renaissance (Othello)
River Rescue
Road Race
Robot Panic
Robotron 2084
Scott Adams: Adventure Land
Scott Adams: Mission Impossible
Scott Adams: Pirate's Cove
Scott Adams: The Count
Scott Adams: Voodoo Castle
Sargon II Chess
Satellite Patrol
Scorpion
Sea Wolf
Seafox
Serpentine
Shamus
Sir Lancelot
Skibbereen
Skyblazer
Space Ric-O-Shay
Spider City
SPIDERS OF MARS
Spike's Peak
Spills and Fills
Squish'em
Star Battle
Star Post
Star Trek - Strategic Operations Simulator
Submarine commander
Super Amok
Super Slot
Super Smash
Terraguard
The Sky is Falling
Threshold
Tooth Invaders
Topper
Trashman
Turmoil
Tutankham
Type Attack
Typo
Video Vermin
Videomania
Visible Solar System