I have integrated with LDS before, its been a while and I remember having some challenges with getting all groups retrieved correctly. But technically there were no big issues (just a lot of searching through ldap to find the right directories). I did do the integration with the latest version that has more features on how and the module searches for users.
However I do see that you refer to modeler version 4.8 the LDAP module has had some significant fixes since the 4 release of that module. (BTW I'm referring to the ldap synchronisation module, I have no experience with the Ldap provisioning module)