[Koha] LibSys to Koha migration

Hi there, I have to evaluate the feasibility and difficulty of migrating a catalog from LibSys ILS to Koha. Grabing information from the "Inernet", I found out that apparently LibSys doesn't provide an export module, and so export must be done via a Report module. The result data are not MARC in any way, and have to be reformated heavily prior to be imported into Koha. Does any library, and especially indian libraries, would accept to share their experience, tips, and tricks, migrating from LibSys to Koha? Kind regards, -- Frédéric DEMIANS http://www.tamil.fr/fdemians