you will see when you look through the posts on "Chinese cutters"
that they have issues I will not get into bashing them but if you read the posts you will get the drift, as far as the vinyl goes there are several kinds and many brands, the 3 basic kinds are;
1, cast which is the most durable and will hold up the best and conform to rivets and ribs etc, better than the other types..(costs the most)dosent shrink or shrinks very little less tenting on rivets etc.
2, calendered which is a medium grade material that will last 3-5 years out doors depending on the brand and conditions that it is exposed to uv, etc..
will not conform to rivets as well tends to shrink and cause tenting over rivets etc, in a short period of time. (cheaper)
3, mylar films like chrome will not conform to rivets and curves and will last 3 -5 years (if lucky) depending on conditions uv etc,
as far as the brands go there is Oracal, 3M, Arlon, Avery, and a few other that I cant think of right now, most of the brands are ok you need to find a local supplier and see what he stocks and try the difent brands to see what you like, how they cut, weed, apply, good luck //chopper