I downloaded quite large OpenStreetMap dataset from <https://www.geofabrik.de/> in osm (or pbf) format. Namely Czech Republic. Geofabrik provides ESRI SHP files too, but I unfortunatelly need more attributes (are not included in prebuilded shp files). 

Question is, how to import OSM to the QGIS? 
I know 3 ways, but each of them has issues or doesn't work:

**1) Vector->OpenStreetMap->Import Topology from XML...->Export Topology to SpatialLite**

This works, but:

* relations are not imported; some attributes missing (when compared
with OSM map on the web)
* polygon holes are not imported correctly (courtyards of houses are
filled)

**2) Add Vector Layer...**

Simple, but it imports nothing! After openning .osm or .pbf file (using UTF-8 encoding), QGis shows dialog, where number of elements is ZERO (points, lines, polygons, ...)

**3) Import OSM File using QuickOSM plugin**

Plugin is computing many hours, but at the end, there is no new layer, or sometimes layers named OsmFile, but empty. 

I have newest QGis (2.18.12) and newest QuickOSM plugin (sorry, I don't see it's version in gui). My PC is Intel Core i7, 16GB RAM, SSD disc, Windows 10 Pro.