my experience with Satvata tantra
Recently I've read this prominent Vaisnava tantra of the Pancaratra canon spoken by Siva to Narada Muni in 716 verses, similar in length to BG. The reading of Sanskrit takes about 2 hours. I had a very good feeling after reading it.
(The first two chapters in English edition are in Harvard-Kyoto transliteration system. All other online versions of this edition seem to lack Sanskrit.)