Most teenage boy's dream, an all-female school that specializes in Mechsuit piloting introduces a single male student.

These Mechsuits (called "IS's") were originally designed for space and the military are only used for sports and competitions. Adding to that they could previously only be controlled by women (no explanation why) and the protagonist is the only known exception.

The show is a pretty typical "clueless male protagonist" harem and overall is fairly amusing if you overlook "a few" holes in its story, science and rationality, like removing the torso armor and helmet from them, or how they reduce in size to a bracelet.

2nd season becomes more of a Ecchi and has less plot, but over its still watchable.

Pros:

• Unusually weak male protagonist, nice to start with a non-OP main character.
• Diverse group/archetypes of "characters".
• Good humor / mocking of protagonist.
• Two seasons.
• Multiple OVA's.
• Consistent animation.
• Good English Dubbing.

Cons:

• Typical harem character archetypes.
• High cheese factor.
• Very Predictable.
• Unexplained plot mechanics.
• "Upgraded" modes on the IS can look goofy.
• No apparent deeper plot, just the episodes at face value.
• OVA's tough to find.
• 2nd season is weaker overall