i chose a safari snorkel just cause they look nicer on the disco1 than the other types that come through a massive hole at the rear of the wing. was easy to fit with very good destructions and came with everythin i needed to fit it apart from silicone sealant.
Safari snorkels - real easy to fit ( ok I'm lying) but fairly straighforward to fit if a little fiddly. As for are they any good - bloody awesome.
I'm with 90boy, if you can afford one and can't be arsed to make your own then they are worth every penny - I got mine of ebay 2nd hand so it's worth keepin your eyes open.
Ive seen this come up a few times and always wondered how they exit the engine bay if you don't have to cut the wing.. or do you still have to just not as much as with others??