I use Gerber 220 series which is made by 3M for Gerber. I've never had a problem in 18 years of using it. It's has always done what it is made to do and has never let me down or made our company look bad in anyway. I wanted to try Avery just because the color selection was really good (Gerber's color selection is lacking and hasn't been updated for years). I'm glad I never did try Avery and thanks my lucky stars for this site and all the members who posted issues so I didn't end up with problems.
I have used Kapco, the only thing I don't care for is the thickness, always seems to be the hardest stuff to weed. I find Oracal 651 less difficult to weed than Kapco, but otherwise ok. Also use FDC and General Formulations (which I think is unbranded FDC) which weed very easy. I am going to be trying some Colburn fluorentine gold on a window job this week.
I use mostly Avery 6 and 8 depending on the application. My only failure with this is when ( as a newbie) I applied vinyl to a latex painted surface. I've only been at it 2 years though. I was using metamark MD5 for printed stuff on the versa-camm and have recently been trying the Oracal 3651 print media. I find it is noticably less white than the Metamark MD5. Haven't tried the new MAX inks yet..
Signs That Work !
Eagle Bay, BC
Like a lot of people on here, I try to stick with Oracal. The stuff is dirt cheap and good quality. I use almost their entire range of calendered vinyls and then keep 3 different styles of their digital printing media in stock, plus laminate. Great stuff.