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Yes, they're well worth having. As for being "not ideal" you can buy a kit to fit a filter in the feed to the engine but it's much more pricey than the standard return-line kit.I'm happy with the return-line jobbie.
Also available are the "Hide-De-Hi" filter kits that use the Triumph Trident style filters. http://www.geocities.com/donaldgreg/technical_tips.htm (Hide-De-Hi)These kits can be easier to install as they take up less space:(UK) http://www.tri-corengland.com/acatalog/RS001_-_RS020.html = RS009 filter kit(US) http://www.mapcycle.com/itemdesc.asp?ic=MAP6510&eq=&Tp=