We are currently on tour (drying out at the public library in Anacortes, Washington) and we've been using our MSR Velo in the rain the last few days.
After a few days of showers I have to say I love this tent. The extra large vestabule is great for all the bags and still leaves room to boil water for tea in the morning. When we leave the tent to go about town we can zip the bikes under the vestabule.
We purchased ours on eBay.