Havana, Havana, Havana. In realistic terms you get a day and a few hours to check out this wonderful city. Arts and crafts everywhere but especially a warehouseful down by the docks. Museums, music and cafes everywhere. Safe as houses - and, with a few exceptions, all walkable. Trouble is you want to stop and absorb the atmosphere, enjoy a drink. check out the band, or view the art.
Each of the treks has its own virtues and well worth the effort.
As with the other reviews of this trip, be prepared for long bumpy periods on the coach. It is air conditioned and comfortable. The driver does as many sideways miles avoiding potholes and other lumps in/on the road / track as he does forward miles. Average speeds are therfore low by comparison to roads at home.
Don't forget to pack the mossy repellant and fly killer. Mosquitoes are pretty voracious in and around Baracoa in particular. A quick blast from a small aerosol fly spray will stop them getting you whilst you sleep.
The only shops, in the normal sense, are at the hotels and therefore shopping oportunities are limited so buying stuff we take for granted may be difficult.
Be prepared to realise Cuba only has its own identity since 1959.
UK mobile signal coverage was good at hotels but a little iffy elsewhere.
Arm yourself with low denomination currency, pens soaps etc - especially if you are a photographer.
It is not a cheap place for the tourist but the 'Trip Notes' advice on cash to take is pretty much spot on. Also be aware that the airport Codeca does not have pound or euro coinage so you could be left with a few convertible pesos if you leave it to the departure lounge to sawap your money back.