I owned one for a brief period of time in the late-80's. The gun itself is a solid performer but may not like some of the shorter OAL 9mm rounds; my former agency issued a 100 grain JHP at the time which was pretty short, but it had no problem with Silvertips. It was very accraute, but the sights did leave something to be desired. You could probably find a replacement rear sight at Numerich Arms, but the front sight is part of the slide and it would be difficult to change (unless you wanted a gunsmith to do it, but you would probably spend more $$$ on that than you paid for the gun!). My suggestion is to use the old trick of a bit of model paint on the front sight (white, yellow or any fluorescent color would be best) to help pick it up faster. You could paint the rear sight a contrasting color.
The 951 was a great gun for it's time, but I recall it had it's issues. Some of the Egyptian guns had weak slides, but I've never heard of any failures. The safety left something to be desired as well. As a military gun it was a good choice. As a civillian carry piece I would have to think long and hard about it. If it was all I had, I would practice using the Israeli method of draw, rack, fire until it was second nature.