[broken link removed]As the above article describes, the essential thing is that an Investment Trust is a closed fund. That means its shares can only be bought and sold between willing investors and so there is a supply and demand factor overlaid on top of the intrinsic Net Asset Value (NAV). As the article explains they almost invariably trade at a discount of maybe 10% or more.
So, you might say they are a cheap access to the underlying assets, unfortunately they will likely also be cheap when you go to sell. Also you will likely find a bid/offer spread i.e. you will get a lesser discount when buying than when selling.
The more common collective investment funds are open ended, which means the fund itself guarantees to trade at NAV by creating and cancelling units/shares as required.
Personally, I would think the extra uncertainty of the supply/demand factor in Investment Trusts is undesirable and probably not compensated by the discount.