I have a large library of print manuals. I also subscribe to loaddata.com.
About 10 years ago, it was the bomb. Great original data (not recycled from existing loading manuals), full pressure levels, and unique data you would not find elsewhere.
Today... it's not what it was. Most of the data is recycled from other published sources (Lee, Hodgdon, Alliant, Speer, etc). About 5 years ago, they started culling and removing a good deal of full power older data which didn't meet either current watered-down SAAMI specs, or current watered-down loading manual data. There is some original data on the site, but nothing particularly unique or unusual, and the original rifle data in particular is weak.
It's all liability driven.
I still subscribe because more information is better than less, and sometimes I find a worthwhile nugget in there. But given its current lame data, and the availability of the free online Hodgdon Data Center, you might question the need to spend the money on loaddata.com.
If you have a bunch of old-fashioned propellants you need data for (Bullseye, Unique, 2400, IMR-anything, etc) , it might be worthwhile to try for a year.