Summoning was done really well in shadow run... Although it was time consuming
They did a great job in SR4, when they split summoning and binding into two separate things. You could summon a spirit at a moments notice, but it had only limited abilities, and if you wanted to get a full powered spirit, you had to do a lengthy ritual to bind them to you. It worked really great. Overall, I agree, the way Shadowrun did its magic was really good.
Though I've played a game without any magic system at all, and I like that better than anything. The world was full of people who used magic like other people breath, and with Fate Core, this got really easy to replicate. Instead of having extra rules, you would just, for example, roll burglary when casting a spell to open a locked door, and instead of picking the lock, you described how you draw runes around the lock etc. in order to magic it open. Doesn't work for every game, but it is so beautifully simple for the kind of fantasy games I like to run.
Dresden's own system does a pretty good job of emulating the magic in the Dresden verse though, so I wouldn't necessarily say other systems are better, it's all a question of what kind of magic you want to emulate.
