Hello. I bought an XL-S a week ago, but I was disappointed with how it was calculating ETAs on some highways (see my thread on this topic). I decided to try a Garmin Nuvi 350, and return the one that I didn't like.
I've used the Nuvi for a few days, and its now back in the box, most likely to be returned. I should point out that I am no TomTom fanboy (no offense to TomTom fanboys!)... the GPS this one is replacing is, in fact, a Garmin, and it's worked fine for me for the past couple of years.
(I assume the 350 and the 200W are similar enough to make these comments valid in your case.)
Things I like about the Nuvi:
1) ETAs are more accurate. I don't care if it's off by a few, or even several minutes (depending on the length of the trip)... it's unreasonable to expect absolute accuracy. But the TomTom drastically overestimates ETAs on certain routes.
2) Routing is a little better. As I mentioned in that other thread, the TomTom gave me a slightly wonky route to my office, while the Garmin picks the better route. But in most cases, the route the TomTom chooses is fine.
3) Autozoom feature is better. When I'm on the Interstate, I like to keep the map zoomed out so that I get more of an "overview" of the route and what's ahead. But the TomTom annoyingly zooms back in after several seconds. The Garmin, on the other hand, stays zoomed out until a turn approaches, at which time it zooms in. TomTom could easily fix this by adding some options for controlling autozoom.
4) When in normal driving mode (not navigating a route), it shows you the names of each upcoming cross street. Maybe the TomTom does this, but I haven't figured out how.
5) Automatically switches day/night mode.
Things I like about the TomTom
1) To me, the maps look better. The Nuvi's map display looks kinda cartoony, with a gaudy fluorescent purple line indicating the route. I wasn't too fond of the TomTom's default map colors, but that's the great thing about the TomTom... I was able to change them to my satisfaction. Don't like the Garmin colors? Tough.
2) QWERTY keyboard option. I can enter information much quicker than with the ABCD keyboard.
3) Itenerary planning. I'm a wedding photographer, and this feature is very useful... I can enter the destinations for that day (bride's house, church, reception venue, then back home) before leaving.
4) Information shown on map screen is customizable, and can be placed on the side to save valuable vertical space. With the Garmin, again, if you don't like the 2 pieces of information it shows on the map screen, tough.
5) UI seems quicker and more efficient. The "Done" button (in menus/preferences) instantly takes you back to the map in most cases. With the Garmin, if you're deep into menus, you have to hit the "Back" button a bunch of times to get back to the map screen. And overall, I just find that I get things done a lot faster on the TomTom.
6) You can make certain corrections on the map yourself, and automatically download corrections that have been made by other users (can be restricted to only corrections that have been verified by TomTom if you prefer).
7) Computer voice (required for speaking street names) sounds more natural / less computer-like than the Garmin.
8) Customizable menus. Not officially a "feature", but with the freeware app TT Menu Designer, you can customize the TomTom's menus. Maybe it's just me, but it really irritates me to have a device's menus cluttered with things I never use (Traffic, Weather, etc.). I just don't like seeing all that stuff. With TT Menu Designer, I can get rid of those things, and can also rearrange the menus in a manner that works better for me.
So, after balancing all these things, I decided that I will almost certainly keep the TomTom and return the Nuvi. I'm not thrilled with how poorly the TomTom calculates ETAs, but given all the other wonderful things about this GPS, I'm willing to set that issue aside for now (with the hopes that it will be fixed in a future update).
--Michael