Hello there. Which model is it, specifically? They can have different heads.
Among others, I use an AC 707 Autocolor, and I would qualify it as one of the best enlargers ever made. Yes, it is simply OUTSTANDING for black & white work. The dichroic filter set, the built-in light timer and internal swappable diffusion boxes are all extremely convenient features, making it a versatile and complete apparatus. The negative holder is modular and fits all sizes up to 6x7 by changing the masks only (but it can work as well as a universal holder with anti-newton glasses and its moving masks).
It has as well a built-in lightmeter and color meter facility, which can be handy and helpful. The only drawback someone finds is that the meter cirtcuitry is sophisticated and all this built-in features could be subject to damage on the very long run. You understand that a modular enlarger leaves the chance to change one single part in case it would brake. However, the whole machine is solid and well built, and personally I never use the light and color meter facility, so even if it would eventually stop working that would not be a great deal to me.
In few words: if the price was good, I would have no doubts in purchasing it again!