The IGI doesn't have full coverage of all parishes, so it's really a matter of luck if they have the parish you're interested in. Having said that, their coverage is by far the best online - and free!
The records I have were bought from the Huddersfield and District FHS. The FHS have transcribed these from the originals so should be complete .
If you have lots of ancestors from this neck of the woods, it may be worth your while investing in some of their booklets/CDs. I've built mine up over a few years now but there are still gaps in my collection.
If you haven't already visited their website, it's
www.hdfhs.org.ukOnce you're there, hover your cursor over 'Publication' , and then 'Society Publications' and click on 'What We Have'.
Another hint, once you've located a parish record and,again if you haven't already done so, is to request copies of the actual entry in the parish records. You need to contact the West Yorkshire Archive Service
www.archives.wyjs.org.ukThe charges are very reasonable. Sometimes the copies don't tell you anything more but often - especially with marriages - you can find out a little bit more (e.g. names of witnesses) which will help you trace earlier generations.
Sorry if I'm telling my granny how to suck eggs!!

Jill