Compared to Nani, Guardado is a little bit more effective and consistent. Compared to Park, he doesn't have the same work rate, but he does work really hard. Compared to Valencia, he is a much harder worker. Guardado could move to the next level and could be a top-four player in any of the top leagues. I still think he will be because you don't see many wingers these days. He's in the mould of a modern winger; he puts crosses in; he's good one against one (which not many people are); he puts a lot of work in and tracks back. All-in-all he is a complete player. He's become more consistent in the last 12 months too. First of all, the only thing Guardado would bring to Man United is that he can play LB and LM/LW, and he can play in almost every formation. He is not that good one vs one (although he knows how to take his man) and to say that compared to Valencia he is a MUCH hard worker is stupid. He can track back like Nani but I don't think we have a trouble there since we have several players that can do the same.
Now, as frustrating as Nani? Hard to say. He is frustrating at times, but in a different way. Guardado sometimes will try a chip instead of a cross from the edge of the box when you are 1-1 in the 88th minute, but he could also pull a 30-yard screamer in the same game 4 minutes later. I'm not saying Nani can't do that, which is exactly the point I want to make. Funny because he's actually a good player and one of the prime candidates for left wingers we could bring in to compete for first choice left winger or to replace Tosic if we move him on having decided he isn't a good enough first team option.
He's currently injured which is perhaps why he isn’t being as hyped up as Di Maria has been this season and to be truthful it’s not the first time he's had an injury. He should be just about fit for the world cup in the summer. So the timing of this injury (and the fact he won’t be on form in the later weeks of the season) could mean he's available for a "value for money" reasonable price before the world cup. Although he's likely to be one of Mexico's star players in the world cup if he gets back to full fitness and his hype might rise again after the tournament ends.
As for what Guardado would bring, I think fans of Valencia would likely be fans of Guardado too. He's fast, gives good width to the side, is a team player, works fairly hard and he can finish his chances. Not like-for-like with Antonio Valencia but more similar to him than the other candidates we might be looking at bringing in this summer. More of a traditional wideman.
So Guardado at a more reasonable price to come in and compete with Valencia and Nani for the two wing positions next season (Valencia right, Guardado left - Nani right, Guardado left or Nani left, Valencia right with Guardado on the bench) would be an idea I'm a fan of.
Particularly as he's a good option for the left role of a front 3 which is what we're always likely to play in the big matches. Nani has never looked like he had a clue in the few matches he's played wide left in a front 3 and Valencia is unlikely to take the role. Giggs might be an option now but will he be an option for next season? Doubtful. And he's best suited to playing in the midfield 3 rather than the front 3 anyway; having a left attacker who could play that isn’t Rooney or Park would be a big benefit for the big matches. Not as consistent as Valencia mind you though.