Baltic Cruise excursion + transfer from Heathrow to Dover



Hello, we are a french canadian couple from Montreal, we are going on the Baltic 12 day cruise with NCL Jewer in June, the this is our second cruise (we did the mediteranean cruise with Celebrity), we are shopping to book the transfers from London Heathrow to Dover (very expensive) we do not want to go by
train with all our luggage...we were wondering if some of you have taken the Silver Fleet (motorcoach) transfer to Dover, they pick you up from your hotel (in our case
airport hotel) round trip for 95 pounds per person, we find it`s a really good price...any comments on it?

For the excursion, we usually like to explore by ourselves, we traveled a lot and love the hop on hop off buses, we did our research and these tours are offered
in most of the cities we are visiting (Copenhagen, Berlin, Thalin, Helsinki, Stockholm...) anyone tried these?

Any information would really be helpful and appreciated, thank you