I've had my 55-14 for almost a month now. It's been on several gigs with me already, and I've spent a lot of time with it at home. So I'll give my impressions, now that I've established more credibility with the bass...
My 55-14 is my first and only Lakland, and I really like this bass a lot. The feel and ease of playability is practically flawless. It's not too heavy either, which helps with the playability. It's obvious that this bass is a very high-quality instrument, that was built to extremely high standards.
I put D'Addario Nickel XL's on it when I first got the bass. I liked the tone for the most part, but thought it was just a little too bright and mid-forward for my tastes. However, now that the strings have had time to mellow out a bit, the tone is right where I want it. The alder/rosewood combo already gives the bass a push in the mids, so the strings mellowing out a little has given it just the right balance of aggressiveness and smoothness. The tone is right in the sweet spot for me. I also just ordered some DR Sunbeams to try on it.
I'm amazed at how versatile this bass is. The combination of the MM and Jazz pickups, plus the EQ and coil switch give it such a wide range of sounds to choose from. Everyone always raves about how good Lakland necks are, and how good their low-B string sounds. I've found that to be 100% accurate on both accounts. The neck on this bass feels amazing, and the low-B string is so thick and full sounding.
I've been playing passive Jazz and Precision basses for years, so it's taking a little adjusting for me to get used to the hot active output of my 55-14. On my Jazz or P bass, I can dig in when I need to, and it doesn't really overdrive or distort. On the 55-14, it really boosts the signal when I dig in, sometimes overdriving the gain on my amp or in the house. This is no big deal... It's just a matter of me getting used to this bass, and approaching it a little differently than my passive Jazz and P bass.
I'm loving my 55-14 so far. I still use my Jazz and P bass as well, but this Lakland really hits the mark for the applications in which I need a 5-string.