I just finished reading up till chapter 91, and it now definitely does in my top 10 list of manga - very addicting and breathtaking I should say.
But I must say that the release dates for each chapter does tend to take a long time -
one chapter per month in the Jump Square Magazine(and since it said at the end of chapter 91 that chapter 92 will be released in July, it is sort of frustrating having to wait another month)
Chapter 91 kinda felt short too(24 pgs) compared to normally about 30 pgs chapters.
whereas there are other mangas which are weekly or fortnight releases.
On the other hand, I guess one good thing is at least the author is not really being pressurised by the Magazine for the manga chapters so we would be getting a well presented storyline.
Next chapter should be released in the upcoming week.
There is something strange in release dates given at the end of each chapter – it is always said that the new chapter will be released one month later than it really is. So chapter # 92 will be released in June.
Actually, if you purchase a magazine at the newsstand the date of the newest magazines is always for the next month. Here it is the end of May but I've seen many July magazines out already. It's the same for Manga. There are already some fake spoilers out but it should be out soon. Definitely this week.