Honestly, you'll find quite the "spread" when it comes to your question.
The reason being: WotR has a polarizing effect on people. That is to say, you'll find individuals here on OR that are very happy with the product and its ruleset - and play it exclusively; and those that are frustrated by some of the rules that allow "power gaming" aspects to the game (which those say make the game very unbalanced).
WotR Pros:
1) You get to use all the models you wanted to use in SBG, but couldn't
2) Moving is A LOT easier
3) The book contains a sample game, so you can get more familiar with what a rule means in a real situation
4) It's very easy to go from reading the basic rules to playing a game with minor problems
5) You get to roll A LOT of dice and kill A LOT of models
6) The basic rule set is complete and sound with not many loopholes
7) Statlines are very comprehensive and the Armies are well balanced
There are a lot of scenarios and articles to add to the variety of the book
9) There is good opportunity to have very strategic games and everytime me and my crew play we come up with new combinations and strategies that are "cool".
WotR Cons:
1) There are some questions that EVERYONE is waiting for some consensus on (Hero's abilities --> formation allocation)
2) Some of the special rules can create OUTRAGEOUS combinations (Aragorn + Gimli)
3) There are multiple type-o's in the book
4) Magic is a little overpowered at times (against non-heroic troops)
I played both SBG and WotR, and my own personal opinion on the game is that WotR is more fun to play. The rule book is very well written (and the community is indicating that GW has a FAQ together to answer some of the harder questions).
If you look through the WotR forum and Official Rules forum, here; you'll find quite a few of the concerns of rules addressed (since we all seem to be running into the same things that are confusing).
I'd say resoundly: YES, WotR is a great game to play!