Union makes a great binder, just not well recieved by this group of forum jockeys. Check around and you will find other forums full of equally knowledgeable people who rave about the good points of the Union design. PERSONAL PREFERENCE.
If you want to try the binders before you buy them then demo them from a shop. Many shops offer demo programs for binders as well as boards. Typically with binders the first day's demo charge will be taken off the retail cost of a binder should you decide to buy.