There are several interesting aspects about it, including its brevity (only 14 pages including the title page and a page of copyright warning in Hebrew and Arabic). Naturally it consists mainly of relevant biblical passages, including much of what we Rabbanites call Hallel. Interestingly there are a few berachot (blessings) which are very similar in form and content to rabbinical blessings. For example, there is a berachas shehechiyanu (pg. 11) which differs only by the insertion of the word בשלום.
There is a cup of wine, to be held while reciting some ki le-olam chasdos. The בורי פרי הגפן is vocalized with a qomatz, thus showing that the Karaites agree with the grammarians (and most present-day Ashkenazim). Famously the Chacham Tzvi is reputed to have mocked people who said "borei peri ha-gafen," which I think predominates today.
Chacham Tzvi's attitude is quoted by his son in לוח ארש pg. 67a:
There is a combined beracha for matza and marror, and an interesting beracha of "hamotzi lechem ani min ha'aretz."
There's also a form of Kiddush to make - if Pesach falls on Shabbos.