Ultimate X-Men is a huge waste of time and money. Nothing happens in a single issue. They take about two minutes to read. It's ridiculous.
Ultimates by Hickman is a little trippy but pretty interesting, I'd recommend it.
Ultimate Spider-Man, like the opening of the original Ult Spidey, is extremely decompressed with almost nothing happening in each issue. It's not bad, but it's not worth the money.