Right now yeah, it's good. Lyft is trying really hard to get drivers and passengers in Philly. Uber got here first, Uber probably has 70-80% of the market share. With the shared $1500 referral bonuses (you split it with your referring driver), the guarantees, and the power driver bonuses, they're really set first on getting drivers over to Lyft and keeping them from doing Uber at the same time. The guarantees are the big thing - they are mostly $20 fare/hr guarantees with $25/hr on Friday and Saturday nights. If you want to hit the guarantee, you better not run Uber at the same time. Actually I have in the previous weeks before this rate sale (Lyft was half-off all week) and just when I think I'm going to clear an hour hustling, I get another Lyft ping during an Uber ride.
Now that wasn't enough, but with the rate sale Thursday I could really see the effect on Uber. A lot of drivers are on both - Thursday night Uber was surging in weird places at weird times because there simply weren't enough drivers - everyone was on Lyft.
If it keeps up, Uber will surge more and Lyft will look better for riders. Lyft's prime time system is more fair than Uber's. The prime time area can be just a couple of blocks, but as you know Uber lights up center city in 4 really big areas. It's really unfair to someone in north Mt. Airy to pay a surge because Manayunk has a lot of drunk people who need rides (and Manayunk always has a lot of drunk people who need rides lol.)
Now what's bad about Lyft:
1) For some reason Lyft rides of equivalent distance and time are coming out to be lower fares than on Uber, in some cases by $2. This despite the fact that the per mile and per minute rates are the same! I don't have that many exactly equivalent rides to check but the ones I have show Lyft as being a lower price! Lyft doesn't give us the same breakdown Uber does on rides, so I have no idea what's going on. A lot of passengers have said it's cheaper for them a lot. On the other hand, Lyft is more expensive but better for drivers on those <1.5 mile rides because they seem to be including the trust & safety fee in the calculation of commission, but Uber doesn't. That means they take 20% of the $5 minimum which is $1, whereas Uber takes 20% of $4 ($5 minus the $1 trust & safety fee), so you actually net less for each ride ($3.2). Again it pisses me off to no end I can't see the breakdown for each ride on Lyft.
2) Keeping your acceptance rate above 90% is a must for Lyft if you want the guarantees and bonuses. So again, don't even think about double dipping. Keep 'em on our side is the Lyft plan.
3) The surge areas are smaller. So you have less chance of catching one. And there is no way to tell if you're getting a surge rate so you can't cancel on them the way you probably do on Uber if you are in a surge area and get a non-surge request. You only find out if it was a surge rate or not the next day.
4) You have to schedule a test drive with a "mentor" to get on board. At least this probably weeds out obviously bad cars and drivers. This is a good thing in the long run.
All in all I definitely prefer Lyft right now. But that won't stop me from stalking surge rates on Uber. It's worth the gamble, even during a $25/guarantee hour for a 2x or greater surge. Anything less than that and I don't care, I'll work Lyft. If Uber is surging, I will make those Lyft guarantees for sure.
I had a drunk yacker (er, talker) in my car last night, I really don't want them aha. 
