Depending on your lengths and which fields we're talking about you may run into some field length issues. Import validation will let you know tho. There's some tricks around even that though if it becomes a big hiccup. We can always do a lil custom dev to lengthen field(s) or you can use other merges to point to longer fields/storage spots and call those merges from the field that is too short.
For Instance: Say page title is too short, put ##LONGDESCRIPTION5## or ##CUSTOMFIELD[Name]## (not sure on the syntax of that one) in page title, then in the field you use you can stuff your longer text. Again, this could affect search a bit, as page title is given more weight than long description or custom fields, but it should still find the words in those other fields.
Ideally, i'd much prefer to see the field lengthened if you run into this. We have pretty long fields though so try it without any work-arounds first.
The cool thing about the conditional merges is you can tailor content based on your visitors too! Customer types of Wholesale can see extra wholesale only text...visitors coming from Google can see specific content...visitors from Bing Cashback can be shown a big Cashback icon...so much can be done with them.
Ed Sturrock
Co-Founder, VP of Product Management