It's undoubtedly a bit too ambitious/overly drawn-out for its own good every now and then, however, I did typically find Dune to be a mostly sufficient and adequately engaging offering from director David Lynch.
Although Dune is surely his most inadequate effort to date, I did reasonably feel that the film was relatively effective for a sci-fi epic based on a renowned book, and it was also nice to see this properly maintained some of Lynch's trademark surrealistic qualities in a couple of noted scenes here and there. The overall production design throughout, and several of the characters in this were rather fine in my book as well.
Ultimately, the collective narrative is easily Dune's weakest factor due to it being fairly misguided on more than a few fronts, and it certainly could've been worked on more. Hopefully, this year's remake from director Denis Villeneuve will do much better when it comes to that particular angle whenever that is released.