I have been re-reading a few issues here & there over the past few months. I didn't hate the filler between ANH & ESB - there is a bit of half decently written Han Solo smart alecky dialogue if nothing else. Following ESB I noticed a real drop off in the writing quality, and only got about 5-6 issues into that gap before giving up. i'll go back & try again at some point.
For what it's worth, I got the whole run in the old, out of print Dark Horse (paperback) omnibus editions, used, at a very reasonable price - an option for someone who might just want to have a look without investing much time or money.