This guide is a work-in-progress.  You can send my E-bay account a message if you want to give me your information or opinion.

• As I continue to get experience and information with Leapster, I will update the review and table.
• I like the Leapster L Max for children age 3 to 7 who want to occasionally play an arcade controller type game.  I purchased an L-max from an E-bay seller January 2006.
• All games should work with the Leapster and L-max in device screen mode.
• Feature benefit of the L-max compared with the Leapster is the TV available for L-max.  With a TV the audience can see, coach and cheer for the player.  Leapster and L-max cartridges interchange.  The cartridge may have different games to choose depending on mode (screen or TV).  The Leapster screen is larger than the L-max screen on my device. 
• Controls:  My 3-year old daughter has not had a problem using the stylus.  Some children have difficulty.  Some people say the stylus button is bothersome to point at device screen and click button for some “built in games”.  Some people describe it as click down motion.
• Graphics:  Some people say the TV picture is blurry.  I think the graphics are OK for young users.
• Users report that batteries die quickly in both Leapster and L-max.   Batteries die particularly fast for L-max in TV mode.  The rechargeable batteries with a base is recommended.  I use the wall adapter (sold separately) for home use.  I use rechargeable batteries for long car trips.
• Device:  Some users have difficulty with the cover.  I open and close the cover on the L-max for my daughter.

Table
I compiled a table of research.  TV compatible notation was made based on reviews on the web by various users.  Some of the games listed on my table have been discontinued.  (I am having trouble pasting a table.)

Title - TV Available Leapster? - Retail - Comments - Age
Batman YES  Highly recommended 8 - 9
Bratz unsure 25  8 - 9
Cosmic Math unsure  1 or 2 player 6 - 10
Disney Princess Enchanted Learning No 30 Recommended 4 - 5
Dora the Explorer Wildlife Rescue L-Max Yes 30 Recommended 4 -6
Finding Nemo   No 25  3 - 6
First Grade YES 25 Recommended 5 - 6  or-7
I Spy YES 25  6 - 9  or-10
Incredibles No 25 OK 7 - 9
Junie B Jones Journal No  Highly recommended 6 - 9
Kindergarten  YES 25 Highly Recommended 4 - 5
Letter Factory unsure 25 Recommended 4 - 5
Letterpillar L-Max Yes  1-2 player 4 - 7
Letters on the Loose L-Max Yes 25 Best Rated & Must Have 4 - 6
Madagascar L-Max Yes 25  6 - 7
Math Baseball unsure 25  5 - 9
Math Missions YES  Highly recommended 6 - 8
Mr. Pencil Learn To Draw and Write YES  Recommended 4 - 6
Number Raiders unsure   4 - 7
Numbers on the Run Counting on Zero L-Max Yes 30  4 - 6
Reading Adventure Rock the World L-Max Yes   6 - 7
Reading w Phonics Mole's Huge Nose YES 30  4 - 6
Schoolhouse Rock- America Rock No 20  unsure
Schoolhouse Rock- Grammar Rock No 19  5 - 7
Second Grade YES 30 Recommended 5 - 8
Spiderman NA 25  5 - 8
Spiderman unsure 25 Recommended 4 - 8
SpongeBob Square-Pants Saves the Day L-Max Yes 25 Recommended (both versions) 5 - 7
Thomas the Tank Calling All Engines YES 25 Highly Recommended 4 - 5
Word Chasers unsure   6 - 10
Word Factory Video unsure  Recommended 4 - 7