PDF Split and Merge is a very simple, easy to use, free, open source utility to split and merge pdf files. It's released in two versions: basic and enhanced. Includes a console and a GUI interface.
Splits PDF files as promised, took about 30 secs to do a 1210 page PDF into two halves. Output files look like original.
Cons
None that I can see
Summary
A program that does what it claims to do well. No malware or other gimmicks detected.
Easy to use, works perfectly
janene33
Pros
Different tabs allow for you to select merge, split, reorder, rotate, etc. Very easy to use. Converts quickly.
Cons
If you have an extremely large PDF (like a couple thousand pages), it has a hard time splitting it. Also, on the split screen, the only option for renaming the split up files is to add a prefix. Why can't I add a suffix instead?