I just got the Fiskars ProCision for Christmas and so far I like it a lot. My only problems are:
1. It's very big and heavy, although that could just be because I used a cheap portable trimmer for so many years that I'm not used to anything solid! But I do find myself moving myself to the trimmer, as opposed to moving the trimmer to me when I need it. Not sure if that makes sense.
2. I have a hard time making cuts from small pieces of paper. There are no measuring lines right up next to the blade. I anticipate that this will become easier for me with practice, but I do find myself still reaching for my cheapo portable at times for small cuts.
Other than that, it is very sturdy and cuts like a dream! Also seems to be very straight, but I'm not a perfectionist.