In OOo 1.9.79 Calc when I import a file from Lotus 123 9 I notice the following:
- Wrapped text not coming as wrapped.
- Center across cells text not coming in as merged cell.
- Fixed "title" rows (& cols?) not coming in as frozen.
- Formatting of DATE not coming (just get datevalue #).
- "US Dollar" formatting not coming in .
- Empty sheets not coming in.
- Sheet names not coming in.
- Sheet names used are odd - first is Sheet1, 2nd is Temp, 3rd is Table, 4th+ 
are Table_2, Table_3, ...
- @Column not being converted (even though OOo has a Column function).
- @SumIf not being converted (even through OOo has SumIf function).
- @PureMin() not coming in as MinA() (though @PureMin IGNORES text & returns 0 
only if no values found while MinA counts the text as 0 - I use @PureMin to 
grab the lowest date in a range that includes some text fields so MinA wouldn't 
give the same result).
- @PureMax() conversion MaxA() (though @PureMax IGNORES text & returns 0 only 
if no values found while MaxA counts the text as 0...not as big a deal as MinA 
vs @PuerMin difference).
- @DateInfo(<cell>, 1) not being converted (as something like
CHOOSE(WEEKDAY(<cell>);"Sun";"Mon";"Tue";"Wed";"Thu";"Fri";"Sat").
- @DateString() not being converted (Description: "@DATESTRING(date) converts a 
date number to its equivalent date and displays it as a label using the default 
international date format.")  Something like Right("00" & Month(<date>), 2) 
& "/" & Right("00" & Day(Date), 2) & "/" & Right("00" & year(Date), 2) only 
using local machine date formats.

I have a sample sheet demonstrating these issues - I'll upload it (if I can 
figure out how).