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Benefits of registering include
+ Books (student kit available for purchase) and + certification fee so you're REALLY looking at $350ish without guaranteed boat dives.
Then in the description it says that the student kit is included - that tells me he is using a LOANER copy of the student materials - which is a standards violation for starters and secondly, PADI won't process a c-card from this region without a hologram, which can ONLY be obtained by purchasing the student materials new!! Minimum of 4 OW dives - but does not specify boat dives, and a 3 days crash course - that tells me he is most likely doing all of the confined water dives on day one (5 required), then doing the OW dives on days 2 and 3 - No thanks!
This is a tour company run by a couple that does not live on the island that contracts out independent instructors - it is not a dive shop.