Honestly, this was a bit more 2.5, because I always love (or like) a Lonely Planet book, but this one did not suit our trip. I'm giving it the benefit of the doubt and give 3 stars, because maybe the bits I didn't read (which weren't entirely relevant to our plans) make up for what was lacking. But let me tell you why this book hit a nerve.
We were on a whirlwind tour of Denmark - covering a fair bit in a long weekend. However, one of the main towns we stopped in was Vejle, which the book didn't cover (despite it being in the top 10 biggest cities of Denmark). It even says, "...there are plenty of medium sized towns that are pleasant enough paces to while away a day, but are not particularly worth going out of your way for (no offence to the towns themselves, but we're talking about the likes of Fredericia, Vejle, and Horsens)."
I can't speak for Fredericia or Horsens (though quite a lot of trains pass through or terminate in Fredericia, so maybe worth considering some coverage!) but I spent a day and a bit in Vejle, and it's a lovely place! There's the interactive Kulturmuseet in the Spinderihallerne, which was an old spinning mill (one of the best preserved in the country) that's been turned into a brilliant community space, with cafe included; the Økolariet museum on climate change (a lot of it is in Danish, but you get the picture); and things we didn't get to see, like the local art museum, as well as quite a few heritage museums and castles/manors in the surrounding countryside. There's also at least one cathedral and another church worth visiting; plus a windmill and a theatre. And there are some great architectural works to see, like the Fjordenhus and the Wave on the marina. The marina was so great to visit - walking distance from the centre and so scenic, both in bad weather and in good (we experienced both in about 10 min). And plenty of places to choose from for food - we had a lovely vegetarian lunch at slow-food inspired Onkel A, and a lovely mid-afternoon-snack-turned-dinner at Cozy creperie and coffeeshop. Just don't forget that the Danes eat dinner early - you will not get your dinner after 9pm unless you want a burger (vegetarians do not). Luckily, there was a 7/11 at the station; but had we left a bit sooner, we could have gone to one of the many food shops, or had a look around the shopping centre (if we had time to shop, there was the shopping centre plus the main high street).
ALL THIS. This was all left out because, why? Yet in the book, in reviews of towns for southern Jutland, there's one thing to see and it gets a mention. I can understand keeping in some points like this - Jelling has one thing to see and it's worth it being mentioned - but then it dedicates over 2 pages to Billund and Legoland. Let's be honest, Legoland is brilliant but it doesn't need that much of a write-up; or, if you are going to write that up, stick Vejle in the section, too, because it's only 40 min by bus.
Not to mention not all the hotels in Billund are covered (Hotel Svanen was perfectly comfortable and better priced than what they had listed), but then they only mentioned one Guldsmeden hotel in Copenhagen and not the other one (which was cheaper and nearer to the centre of town and the main station), so no surprises there.
I don't know - writing all this out I really think it deserves a 2, but like I say, I'll give it a 3 only because there's a vast amount that it covers that I didn't really have time to explore. Maybe if I go back and see those parts I'll feel better at scrutinising!