IMO they handle unlike any pcp you can buy today (in a good way!). Really nice to use. If it's the HF model the shot count is reasonable too. If it's the SF model make sure you get a buddy bottle with it.
Easy to change calibre if you want, just need another break barrel of the same era (supersport or early lightning).

With regards to servicing, I'm going to open mine up soon and see what makes it a specialist job. But as said before it probably isn't a DIY job.