The best way is the essencia.
The cheapest is the funnel.
The funnel does clean up alcohol. Its smells and tastes noticeably better.
I normally use a funnel with a coffee filter filled with carbon. I then put one spirit run through it twice (anywhere from 1.5-2.2 litres of 40% alcohol depending on what run I am doing).
The first time there is a big difference, the second time is for a quick polish. The longer the alcohol sits on the carbon, the better it will will clean. I then chuck the filter paper away with he carbon in, and there is no mess.
I just can't justify the essencia at the moment. I think the price is far to expensive for a series of moulded plastic bits, with some carbon in. As we are in a very niche hobby, sometimes the rarity of products like this keeps the price inflated. Otherwise mass production and competition would force the price down to a more acceptable level.
There are others that swear by it though, so if you've got the dough it might be right for you.
At the moment, I would prefer to put that money in my t500 savings pot.
:EDIT:
Looking at the review here
http://www.homebrewmegastore.co.uk/shop/review/product/list/id/448/category/108/ is making me cry and want an essencia.
Time to send a begging letter to Noel Edwards for his next Christmas special methinks.