Somehow, I was able to gather that this grimoire, The Lesser Key of Solomon, is what they call "inaccurate" and "terrible." I'm not accusing you all or anyone else, it's just something I've been hearing a lot.
The thing is that, while I haven't been reading from him, I started out by reading modern books inspired by it, along with Cabala. I know that, with my affiliation to God, I could safely summon or at least petition a Solomonic demon along with the Emissaries and Shems. If the Lesser Key of Solomon is so terrible, do these demons from the Ars Goetia actually exist at all?
Where have you gained the idea that the lesser key of Solomon is terrible? I certainly wouldn't say that some modern pagans might, and some people who cannot understand the language and ideas might, but most serious occultists would not.
I think it is not the only method, I also do not think it is the best method, but it is a workable one. The keys of Solomon have inspired much of modern witchcraft practices and has been used by ceremonial magicians and witches alike for centuries, it is a workable grimoire.
I have this book, The Lesser Key of Solomon. It isn't in accurate or terrible. It is hard to understand, once you research it and re read it a few times you get it. Its instructions on how to summon the Demons, and has some listed.
Also, I would not recommend trying to summon a Demon especially if you do not follow the darker paths. It is dangerous for those who have a lot of experience.