I've been reading how this opening is all the rage.  Some of you 1800+ players, what do you think? 

You cannot expect to gain anything from an opening if you're ignorant of your opponent's moves. This doesn't only apply to the Colle but to all other one-fits-all openings, such as the KIA or the London.

However, it is rock solid and might be a good option for players who use to blunder away their games at move 5 or so.

It's "all the rage" only according to those who wrote a book on th esubject ;)

Seriously, it's a respectable opening, and some strong GM (forgot the name) occasionally plays it against certain black setups. As a one-size-fits-all solution instead it's not very poisonous. Chess would have been a very boring game if white had been allowed to play the same moves against everything and still expect an edge.

As someone here once said: 

"The Colle is a pox on the world of chess". 

It's not "all the rage" at all, but it is a solid way for White to avoid theory - at the cost of not putting enough pressure on Black to have any real chance of gaining an edge from the opening. 

You shouldn't be so concerned about openings until you can get through most games without losing a piece or getting mated to simple tactics, but in the long run you will learn more faster by playing the more mainline simple openings.  You will make a lot of mistakes, that is how we learn.  Just play games slow enough to let you think, and go over your games to see where you made mistakes.

I never liked it. Solidity aside it tells me that my opponent isn't interested in creating a new and exciting game of chess and would rather just roll off a bunch of canned, systematic moves hoping that I will fall for a trick.

And when I don't fall for that trick he is ok with trying to beat me on time. Either way it's a pretty lifeless experience for me.

Thanks all.  I've decided to abandon it and go with  main opening. 

stonewall attack, one variation of the colle system, all those overrated 1800 players fail to defend properly against it,

it gives you a perfect endgame situation

I don't see this being true at all.  Not that it's a horrible opening or anything, but every woodpusher above 1300 or so knows he's fine if he plays a kingside fianchetto against anything resembling a Dutch.  d5, c5, b6, and Ba6 plans are pretty much standard operating procedure, and the ball's in white's court to find a way to stop that nonsense before he's saddled with nothing but a buried bishop.

If talking about 1.d4 d5 2.Nf3 Nf6 3e3 e6 4Bd3 c5 5b3 Nc6 this is a perfectly respectable opening for white. It's playing Queen's Indian ideas as white, and difficult to be bad. Even the colle proper with 5c3 isn't as bad as all that. Your playing white after all, can actually think of it as playing semi-slav as white. What's a good setup for generating counterplay maybe not the best for putting opponent under pressure. That's different to being bad though.