Any PDA or phone that has got internet browser is compatible
Size
No memory required (online application)
Price
$250 [Members] and $290 [Non-members] yearly subscription
Memory Card
Not required
Navigation
7/10
Pros
Frequently updated, Extensive resources, Guidelines rich, Adequate cross linking, Images and PDF documents, Search across all resources, Live external links such as Pub Med articles
Cons
Expensive, No built-in calculators, Need full Red Book version