The line you often see about these books is that they are not inspired and inerrant scripture, but that they are 'worthy of being read'. And I have to say, that's about how I feel myself. At their best, they re-state innumerable things from the Old Testament, and anticipate many things in the New Testament. It does seem clear that the Jews of the New Testament times were familiar with much of these writings, and their echoes in the New Testament are easy to spot. That said, I'm certainly not convinced that any of the key New Testament figures accepted them as unbreakable scripture.
Some over-zealous Protestants like to cherry-pick a small number of verses in order to portray the Apocrypha as containing blatant heresy. But let's be real here - you could just as easily cherry-pick certain verses from the Old and New Testaments and portray them as teaching heresy as well. There's some weird bits here and there, especially in certain books. But for the most part, you won't find much that seems to veer off from the rest of the Bible.
1 Esdras - Mostly a straightforward re-narration of the last parts of Kings/Chronicles, into Ezra/Nehemiah. There's one wacky bit featuring a debate about what's the most powerful force: wine, kings, women, or the truth (spoiler - it's truth).
2 Esdras - Like another reviewer, I thought this was the standout. A lot of good Messianic prophecy, and some powerful scenes of wrestling with questions of theodicy. Ultimately though, this is widely believed to have been written after the time of Jesus, despite being ascribed to Ezra, and thus, just about no one considers it fully accurate and canonical. A powerful read nonetheless.
Tobit - Got to admit, this one felt a bit... cheesy and goofy. It lacked the sort of gravitas and stateliness that you expect of true scripture. Still, it might be the source of that one line in the New Testament about 'entertaining angels.'
Judith - This one has echoes of the stories of Jael and Esther. But I prefer those over this one. Basically, some devout Jewish woman uses sex appeal to get some creepy military leader drunk, and then beheads him.
Esther - Speaking of Esther! That book famously doesn't mention God at all, and these 'additions' remedy that problem. This seems like a (slightly tacky) attempt to make explicit what was fine enough being left as implicit.
Wisdom of Solomon - It starts off somewhat in the manner of Proverbs and Ecclesiastes, and then ends up turning into something more like one of the Old Testament prophets. Overall, didn't find it especially memorable.
Sirach - This one is the real '2nd Proverbs' of the collection. Long-ish but really good. Verse 19:24 might be my favorite: "He that hath small understanding, and feareth God, is better than one that hath much wisdom, and transgresseth the law of the most High." Also has a lot of decidedly un-feminist musings. In brief, a good wife must be sweet, submissive, guileless, sexually pure, and absolutely adoring of her husband.
Baruch - Fairly short, and very much in the vein of Jeremiah, and other prophets. It would fit right in alongside them without much trouble I'd say.
Epistle of Jeremiah - Incredibly repetitive. Mostly says over and over 'idols are manmade and aren't actually living'.
Prayer of Azariah - A very worthy prayer and a very worthy song. Supposedly what Shadrach, Meshach, and Abednego prayed and sang inside the great furnace.
Susanna - A godly woman is falsely accused of sexual immorality by two evil, lustful elders. This story seems to be echoed quite a bit in that added portion of John's gospel about the woman caught in adultery. It raises the question of whether that allegedly adulterous woman was actually guilty, or simply accused by evil false witnesses.
Bel and the Dragon - Two comedic illustrations of the point made in Jeremiah's epistle - that idols aren't actually alive. Reminiscent of Elijah's mockery of Ba'al.
Prayer of Manasseh - Another very worthy prayer. Like the tax collector in in the parable of Jesus, the King of Judah essentially says 'have mercy on me, a great sinner.'
1 Maccabees - Wars. Endless, endless wars. And diplomacy. Wars don't excite me, so I found this one dry and tedious indeed.
2 Maccabees - Blegh. Not quite as dry and tedious as the other one, but reading a marginally more engaging version didn't get me to especially enjoy it. Contains an incredibly sad story about 7 young siblings being brutally murdered one after the other as martyrs for their faith.
In the end, I'm still leaning toward the Protestant viewpoint that these works aren't true inspired, inerrant scripture. If anything, I'd say the book of 1 Enoch (also recently reviewed) has a better claim of being that. Nonetheless, I'm glad to have read these works, and I do think every Christian will do well to read them.