I personally prefer Rivas-style splicers, and that's what we use here for any splicing of 16mm. The tape is pre-perforated so it takes a little practice to get the technique down, but the splicers are solid and easily available on ebay. They look like this: http://www.ebay.com/...=item35eb5f00ba
Note there are two there - one splices straight and the other diagonally. You don't want the diagonal splicer, that's for 16mm fullcoat audio tape. You want the straight type. Also, these are in rough shape, but these splicers are super easy to take apart with just a screwdriver or two, and all the parts can be easily cleaned and lubricated, so they're simple to maintain.
Lots of people like the Ciro guillotine splicers, and they're fine for new film, but they're much more expensive. The advantage is that they don't use pre-perfed tape, and they're less tricky to use.
I prefer tape, because you can undo the splice if you need to and it's less destructive than cement splices.
Edited by Perry Paolantonio, 30 July 2015 - 01:24 PM.