Yes, some of those 1st/3rd person levels just drag on and on, with un-fun (ie patience testing and frustrating more than challenging) difficulty issues. (that train level is one of the worst examples of that)
More of the vehicle stuff mixed in with the 3rd person shooter/platform action would have worked a lot better.
Also, the final level is really nice too (pretty sure it's the final one), the open space battle where you have to blow up that space station (or whatever, I forget what it actually was) in a RoTJ reminiscent assault on the Death Star core sort of thing.
It's a pain to actually GET to that level though. (and I never did without cheating . . . or renting a game with saves that far already

)
Edit: yep, that was the final level, the assault on Xizor's station. Also, there's a "bad" (incomplete) ending and teaser if you play on easy.
On an off topic note, I like some of the youtube comments on and animated SoTE movie/miniseries being a better idea for a film than the prequels were . . . or the special edditions for that matter. (which were partially spurred by the SotE multimedia project, apparently)