Highly recommended, with a couple of caveats.
The cases are polycarbonate, and are not compatible with petroleum products. The importer takes a very hard stand on not warrantying batteries with damage caused by petroleum contact. Also, they produce a lot of power, but for just a short period (maybe around five seconds or so).
A couple of very positive attributes are that they, unlike lead acid batteries, hold a charge almost indefinitely. Another is that the charge condition can be determined by the voltage. They come with an instruction manual that defines the amount of charge as a function of voltage.
All in all, they are hard to beat in any type or racing environment. A little more costly than lead acid, but certainly worth it.
A single "525" starts my 15:1 Donovan 518 cid right up.